By higher education I suppose you mean college, and university. I do believe family's with lower income can not always afford to send there children to a college or a university. However, say that child earns a scholarship online or through the school. Say, though that that specific scholarship does not give full coverage. That person can get a job, part, or full time, and make some money that way, or perhaps ask their parents for a small allowance. A way that this can be prevented, however, is lowering the cost of going to a college or university. By doing this the money wont be as big of a problem for low income parents. Even if the low income parents still don't have enough money at this point maybe the government can create a program in helping low income family by supporting them and giving their child some financial aid.
