It’s not the US, it’s a certain income bands in the US. This forum is probably full of many people who earn at least $100k per year, if not much more, and are likely to be partnered up with someone earning the same. Naturally, if you’re hanging out with people that have a lot of disposable income, they’re going to use that to give their kids as much of a leg up as they can to maximize their kids’ chances of moving up to the next step on the ladder.