If the central banks and the whole financial system weren't creating money out of thin air, interest rates would be positive again in no time.
And that carries a serious risk of implosion of the sovereign bond market. Most of those debts are unpayable, and the only course of action for central banks is to.... do exactly what they're doing right now, buy their own bonds themselves. With more printed money..... see where this is going?
Very well. I still believe it's still possible to reverse the actual trend, though. But that would require a race of politicians which doesn't exist any longer.
The mathematical possibilities prevent it, the national debts of the developed world are simply far, far too big. Some of that debt is a 1 million % joke. 1 million %, I am barely exagerrating.
When the mortgage market crashed the world financial system in 2008, instead of writing off the mortgages that were never going to get paid, do you know what happened? The unpayable mortgages were bought from the banks who owned the debt, by the central banks. In the 8-9 years since, guess what proportion of those mortgages have been paid back? (I hope you're thinking, "but it's impossible for even 1 measly Dollar to be paid back, the borrowers reneged the debt, that was the whole reason for the crash!").
It's a seriously bad joke, as I said, but the alternative was to write the debt off, accepting that it was worthless as it wasn't going to be paid back. There was too much of it, all borrowed to buy in a hugely overbought market, and too many secondary bets (aka derivatives contracts) based on those mortgages. It would've bankrupted nearly every major bank, and that's on the basis of figures that you have to take for granted to some extent (why not lie about a handful of institution's solvency, you're printing up an amount of money that replaces every Dollar, Euro and Pound in the system anyway).
This is where the expression "zombie banks" come from, they're all on death row. They borrowed and bet more money than there is real stuff, by a factor of dozens, if not hundreds, of times the value of the entire world economy. Do you still believe it's possible to reverse the trend?