Because the gambling works and the rich get richer and they have all the money to do a media two-step to make it look like it's someone else's fault. So they get to keep the dough and we get to pay for it, just a small amount - not enough to complain about. Their giant pyramid scheme works.
Because they keep the average persons mind focused on things they can do little or nothing about like minimum wage versus living wage.
Because no one ever asks why if the interest rates are so low why I'm paying my mortgage company an extra 800 a month for the privilege of borrowing money that shores up our property system.
Because they give us 'benefit cheats' to hate - never mind that if all the people who claimed benefits that were entitled to it, it would outweigh cheating by a factor of 8 to 1. So it's negligible. Literally, irrelevant.
Because they give people just enough to make it look like they could do better (the vast majority can't), just enough to make them too focused on other things to complain, just enough to prevent revolt.
It's a very finely tuned house of cards. Some by design, some by circumstance.
Even in this post I've just written theres enough to argue about that would provide diversion - to keep us arguing/debating/discussing so that no one ever pays for screwing us over.