Here are my contributions. If you think anything's retarded feel free to point it out. These are just a series of logical conclusions I've come to after around 20 years of working.
For the sake of a discussion, let's say you're living somewhere where most of your income is in a 20% income tax bracket and a 10% sales tax. This may seem high in the US but is not atypical in Canada and Western Europe. I'm purposely going to work with small numbers here for the sake of a series of logical arguments. We're going to pretend $10 is a lot of money here.
Everyone In Power Benefits from Your Debt
Banks benefit from you being in debt because they collect more interest the longer you're in debt.
The government benefits you from being in debt because you have to pay your interest in after tax income. For example, if you accumulate $10 in interest, you need to earn money to pay that off. In order to get $10 to pay off the debt, you need to actually earn $12 before taxes, so the government has just collected an extra $2. Maybe you're thinking, "I would have been working and paid that money to the government anyway." Well, you're going to need to buy other things down the road. Maybe because you used this $10 on interest, you have to work an extra shift over the course of your working life to save for retirement. Maybe you took on an extra shift or a second job you wouldn't have had to otherwise to pay that $10 in interest. In both these cases you've cost yourself the opportunity to do things you enjoy to give that $10 to the bank and $2 to the government. That time has value too. Instead having an extra day to go fishing or read a book, you've used your extra day to give $10 to the bank and $2 to the government
Cooperate entities like Amazon and Wal-Mart benefit from the increased liquidly consumer debt provides because it encourages people to spend more.
Debt Suppresses Wages and Drives Inflation
How does debt suppress wages? Debt increases peoples liquidity without actually increasing their assets. Let's say your car breaks down and you need you car to get to work. The repairs will cost $30 and you only have $10 in cash. You do not have enough liquid assets to pay for the repairs and get to work. Today, you can put $20 on your credit card allowing you to repair your car and get to work. Now suppose you couldn't take on that debt? You can't get to work. This sucks for you, but it also sucks for your boss. Employers generally make a profit from their employees' labour so if you are not able to make it to work, he can not make a profit off you. Now, if this happens with just one employee he's going to fire the employee, but suppose that none of the employees have access to easy consumer debt to stabilize themselves financially? It would be in the employer's best interests to pay enough to ensure his employees are financially stable enough to keep their cars running so they can continue to come to work to continue to make him money.
How Does debt drive inflation? Tuition costs are a good example. If student loans did not exist no one would be able to afford to go to college at current tuition rates. Colleges would be forced to lower tuition rates or close. Therefore the existence of student loans enables colleges to raise tuition rates, inflating the price of tuition. The same argument can be made for higher end good such as cars, computers and smart phones.
Saving a Dollar is Worth More than Making a Dollar
Let's say you want an item is $20 new. If you manage to save $10 by buying it used or getting it on sale or fixing an old similar item, you have actually saved more than $10. Remember, to get that $10 you would have paid for the item at full price, you actually have to earn $12 because 20% of whatever you make goes to the government. Besides that, you would have paid sales tax on the extra $10, so the true cost of that item new is actually $26, not $20. By getting it for $10 you have actually saved $13, maybe $14 if you get it used on a classified site or a thrift store where there is no sales tax.
The Consumer Price Index is Bullshit and Inflation is Higher than the Government tells You
The CPI only takes the cost of items into effect, not changes in quality. If a pair of sneakers are a third of the price that they were a decade ago, but they last half as long because those savings were found by reducing the quality of the item, the true cost of maintaining acceptable footwear has increased over the course of several years, but the CPI will make it seem as though it's declined. The CPI also doesn't seem to account for the fact that many of these savings are found by exporting manufacturing to jurisdictions with lower labour costs ,which has a suppressive effect on the cost of labour here. This means that even though an item may be cheaper, it doesn't necessarily mean it's more affordable if you've gone from working in a sneaker factory to working as a Wal-Mart greeter and you've gone from buying a pair of $15 sneakers with cash to taking on debt for a pair of $5 sneakers.
Increasing the Supply of Labour Decreases the Cost of Labour
Many movements big corporate entitles and the government have gotten in on over the last 50 or so years increase the supply of labour. Encouraging women to get into the workforce doubled the supply of labour. Increasing immigration increases the supply of labour. Free trade increases the supply of labour, because it enables you to move your factory to Mexico and use the labour there instead. This is not an anti-feminist or anti-immigration argument, just a simple statement of facts.
Most jobs are not very hard and just require pulse., therefore if you increase the supply of labour, you decrease the bargaining power of workers. If your factory worker wants better pay you're just going to tell him to go fuck himself because you now have a virtually endless supply of people to replace him. If wild apple trees are growing all around my neighbourhood, someone trying to sell apples in my town has to offer them at a price that has less opportunity cost than spending the time to pick them myself. If I have no access to the apples besides the store, the store can charge more for apples. Labour is no different. If you have limited access to labour, you will be willing to pay more for labour.