People have lost faith that society can work for them and have observed those in power engaging in corruption and grifts. They then conclude that only a sucker plays by the rules.
My pet theory is that the #1 problem in the USA in the past few decades is wealth inequality, and if we can find ways to stop the rich extracting wealth from the poor, many of our issues will sort themselves out.
The other two don’t have such an issue because they have cheap and small housing options, which are effectively banned in the US due to the effect of various regressive and “seemingly progressive” housing policies
It's much simpler. People notice they can just take things with no consequences...so they do.