flatbusher,
What’s more the assumption is one going to grad school is gaining knowledge and training that will qualify them for employment and in effect they will “repay” what they have gotten through taxes of earned income.
Based on this reasoning, would you advocate for universal free or heavily subsidized college or university education for all US citizens? After all, a few years’ investment would eliminate the need for low income assistance, and thus it would ultimately pay for itself and reduce the Federal budget beyond that, right?