I don't know about that. I know many that have fully repaid their student loans (pissed as hell that they didn't hold on for Joseph Robinette Biden Mussonlin, Jr.'s moratorium).
Loan payments are amortized, meaning that they depend upon future cash-flow for repayment, the same as on any installment loan.
If it's "slavery", it's willing "slavery" into which the borrowers sold themselves.
Whatever happened to consequences for one's own decisions/actions?
Living in the land of deadbeats.