I think the reason is that people know it is a problem but ideologically they really disagree about what to do about it. The impasse creates an opportunity for profit driven actors to fight reforms. Also, democracies do dumb things sometimes. See Brexit.

But also, sometimes people from other countries-- I am thinking parts of Europe-- underestimate how well paid people in the US often are. They compare the averages, like the US only makes 20% more per household, why do they put up with this or that. But that comparison is for the whole country, so imagine if you were comparing all of Europe or China.

I had a friend in Spain at a similar company as mine say, how can you put up with no safety net, etc. But I look at his company and every one at my company at any level gets paid 2-5x as much. So like these are less serious issues if you are paid an extra $1-200k/ year. It doesn't explain the inaction, but I believe it is why a lot of politically influential people don't care.