> American culture doesn't like to think about how much of "success" is down to luck. As often as possible, we want to think it's earned. The idea of trying to make up for some of the luck factor by taking some from those with more and giving it to those with less is almost instinctively repugnant, even if it might lead to higher quality of life for everyone involved.
The US is in the ballpark of other OECD countries in terms of social expenditure: https://www.compareyourcountry.org/social-expenditure