Forgive Student Loan Interest

My comment posted to "Forgive Student Loans? Worst Idea Ever." by Justin Wolfers on Freakonomics:

The government should at least forgive the interest on student loans.

The government shares, through taxes, in the extra income of college graduates. Government student loans, loan guarantees and lender subsidies make the government the equivalent of an equity investor in a college graduate's earnings.

The payment of interest to the lender on the government part of student loans, guarantees or subsidies, is an unnecessary double payment.

Equity investors, like the US, who participate in the profit, through increased taxes on the extra earnings, need not also get interest on their investment.