Again, even if T-bills & personal debt was paid off, there can STILL be fiat paper-money, it's existence isn't dependent on debt at all, it's just a misguided notion spread by some who just want to enrage people one way or another through misinformation, & misdirect them towards their own misguided causes.
Another thing, NO, debt is NOT essential to raising interest & curtailing moneysupply,
the central-bank-money can just be withdrawn from circulation, plus, reserve-requirements can be raised to shrink the pyramid. For a long time, reserve-requirements were considered to be one of the tools in central-banks' repertoire to raise interest & to reduce moneysupply, many central-banks around the world STILL use this tool, most people just don't know about it because Fed hasn't been using it as they believe open-market-operations are a more faster & smoother way of adjusting moneysupply & interest but just because they aren't using it doesn't mean it doesn't exist, they can use that in absence of debt.
Neither is anyone forcing PEOPLE into debt, they go into debt because they want to. As I've said before, this "victim" mentality by the borrowers is the height of irresponsibility,
if one wants to remain debt-free then JUST DON'T BORROW & LIVE WITHIN ONE'S MEANS, it's that simple; people borrowing & then blaming others for it is a sign of an unwillingness to take responsibility for one's own actions!

If borrowers don't borrow then that puts a significant restriction on banks' ability to lend & inflate anyway so borrowers shouldn't escape criticism, any more than bankers!