Top private US schools provide very good financial aid packages and are a very good choice for underprivileged students if they can get in. Schools in turn want such students for diversity and metrics.
These questions are framed in the wrong way. The filter isn't cost, it's getting in, and people from middle class and poor families are at a disadvantage in terms of accomplishments.
You may be interested in Paul Tough’s “The Years That Matter Most: How College Makes or Breaks Us”. Tough makes similar points like this throughout the book.
>These questions are framed in the wrong way. The filter isn't cost, it's getting in, and people from middle class and poor families are at a disadvantage in terms of accomplishments.
Yes and no. In that there is correlation but probably not direct causality. For example, Asian middle and poor families seem to do fairly well in getting their kids to have the right achievements.
Or maybe you tried and it just didn't work out ? What were your test scores ? Did you have something that set you apart academically or otherwise ? Did you castigate MITs prestige in your essay as you seem to do on HN ?
MIT is going to be one of the first choices of any student who has a chance to get in. Even though the vast majority don't overcome their disadvantages, MIT still has more qualified applicants from any large background such that they cannot accept them all.