Who would want to be middle class?

When I was young, or even when I was middle age, politicians talked about helping the poor.  Now they talk about helping the middle class.  Maybe it’s because if a woman earns $29,000 a year (low income) and has 2 children, she qualifies for enough benefits from the government that she’d need a job that paid $69,000 a year to leave poverty and move up to the middle class.  So if she took time out to go to college so she could earn more money, and then had to pay off loans too (supplied by the government), it’s possible she just couldn’t get ahead and would rather stay poor.