MIT is a great financial investment.

How do we know that is true? Among folks whom MIT would accept, do we know whether those who choose to attend MIT get a greater return on their investment (of time and money) compared to those who choose to not apply or not attend?

  families making $200k seems really unnecessary and helps people that don't really need to help

There are certainly families earning $200k who need help. $200k income for a family of 5 in San Francisco is different from $200k income for a family of 3 in rural Idaho.