I make pretty decent money but I also went to school on loans and stuff so I have a lot of higher bills to pay. I still have spending money and it's comfy at times.
Often, I find myself spending 90% on all bills and rarely on anything extra. But I have everything else I want. The thing about working here in the US is different than other countries. My friend went back to Europe last year. They aren't required to work 40hrs a week, still salary, with medical included.
Vacation and free time is valued more than here, it's a different lifestyle, more comfortable one. Of course you have minimum wage jobs and poverty there too. But I've seen plenty of family members rave about wanting to come to the US because that's where all the money is. Yeah right, even with their good education, the degrees don't transfer over and they end up working like dogs once they get here.
I know because my father was a doctor in his country and when he came to the US he had to work every shitty job possible. With time though he landed in a position where he makes really good money and a decent lifestyle. This doesn't happen to all people because there are always a few who don't believe in working that hard, or just stay in the same job rather than look to improving their skill set.