If you want to be depressed about the state of education and opportunity equality in the U.S., take a look at the Hamilton Project's recent study on the lack of low income students attending elite U.S. colleges.
Most high-achieving, low-income students do not even apply to selective colleges despite being highly qualified for admission and success at these institutions. Because they do not apply, these students forgo the generous academic resources, increased financial aid, and better collegiate and career opportunities that selective schools offer.
The chart below, from the report, pretty nicely sums this issue up.
It you're interested in this topic but don't want to wade through the report, see the New York Time's Bridging the Income Barrier at Top Colleges or The Atlantic's R.I.P. American Dream? Both do a nice job summarizing the study findings.