Wealthy family here. It's one reason why I dont work, and as a rule, I can do whatever I happen to feel like at the time. Including buy stuff. I dont really have any practical spending limit. To a point; I always say, I'm not going around buying helicopters or some insane thing like that. Within the realm of relatively SANE purchases, I just buy whatever without it denting my funds (leads to me being an impulse buyer though). Or even go travelling to some convention. And this house is, well, big, and there's a second house too, because why not. I dont go there much though.
BUT, it wasnt always this way. It's my father and stepmother that I live with, my mother lives in a pretty normal place. And way back when, after my parents divorced, my father just had a small apartment for a good while. But things slowly picked up over time, and at some point, my current situation just sorta abruptly happened.
As for the "powerful" idea, hm, my father is good at getting things done, but it's not like he's some high ranking government official or something. Works in the food industry. Travels ALOT. So does my stepmother.
Aside from that though, I'll go with the "autism doesnt discriminate" idea. As someone already mentioned, diagnosis is easier to come by if you have more money, but autism itself could come to anyone.
I think people make too big a deal out of wealth or whatever. Well, to a point. I do know the frustration of being generally broke, from way back when. That can be hard to deal with, indeed.