Earlier quoted context omitted.
It's not insane - it's pretty common in most developed countries. The US is a major outlier.
In many developed countries, 42% tax would cover healthcare, a pension you can actually live off of, and fully-paid education for all of your children. Californians get none of those things, and I don't really understand what it is that they get over (e.g.) Washingtonians for the extra ~30% in taxes.
I get your point that the US doesn’t provide as much social services as other developed nations. Almost all these nations depend on US hegemony to not have to spend as much on their military. This is a choice that the US made. There are good arguments for scaling back military spending and increasing social spending without compromising US hegemony though, however those choices may not be politically expedient so here we are.