As has been stated over and over (not saying you don't know this, just adding it again), it all comes down to money.
So much money has been spent, they have to see a result, even if that involves people becoming ill/dying when they shouldn't. The injections have a limited lifespan, they need to be 'used' before they are wasted. The governments of the world don't want to answer to their people, when the people realise how much money has been wasted on injections, propaganda, and lockdowns, that instead could have gone towards making sure the next generation are educated correctly (as an example).