Jobs's birth parents were 23-year-old grad students at the University of Wisconsin, not a population known for being rolling in dough. They decided they were too young to marry and have kids.

https://en.wikipedia.org/wiki/Steve_Jobs#Parents

From the page you just linked, Jobs's birth father was "the son of a self-made millionaire".

Who nonetheless didn't feel like his life was secure enough to marry and raise a family right then.

Job's biological father came from a wealthy background. He and Job's mother met at University of Wisconsin (not from the US, but pretty sure that isn't Ivy League). The mother was working as a TA, so she wasn't wealthy.

OK, I misremembered. University of Wisconsin is not Ivy League. But I stand by the point; working as a TA doesn't make you wealthy, but it does mean you can get a better job than working at McDonald's.

TAs can't possibly be wealthy? That's news.