If there are people who could make their loan payments but are choosing not to, this would work on them, because you can go to jail for not paying taxes. 

For people who really can't make a payment, this would reduce the government entitlements they qualify for.

Undisciplined

econ

A Couple of Articles About the Fed

Hadn't heard that and don't know how it would functionally work. If people can't pay their student loans hard to imagine they have the money for a large lump sum tax payment. Maybe if the taxable income is added over a 10 year span. 