The issue I see here is that the government is effectively making slaves or indentured servants. The former is prohibited by the US Constitution, the latter can be done only as a punitive measure after a conviction in a court of law.
>...the government is effectively making slaves or indentured servants.
I think anyone is allowed to quit. The options are quit or work for deferred pay.
Except for the people that aren’t required to work for deferred pay. In the private sector you’d get a small portion of your pay after a few months. It’s called being laid off.