Canceling debt does not make wealthy "see red." Long-term it would harm those who initially benefit from the cancellation by leaving less credit to go around and forcing people at the lower end of the income scale to accept less favorable loans.
If you want to upset the wealthy, you can do any or all of the following:
1. End stock buybacks. These sound nice in theory but in practice they have promoted short-term thinking and have disproportionately benefited the wealthy.
2. Eliminate the long-term capital gains tax rates and treat all capital gains as income (perhaps with some provisions for retirement income).
3. Treat cash loans backed by financial assets (stocks, bonds, investment properties, etc.) as income (many wealthy people use loans backed by their investment portfolios to avoid paying income tax, and their heirs pay no capital gains tax because of cost-basis adjustments), with possible exceptions for loans that are immediately invested (to allow for leveraged investment strategies) and exceptions for mortgages that pay for a personal residence.
4. Eliminate the various industry-specific carve-outs introduced in e.g. the Tax Cuts and Jobs Act (which were nothing more than a corrupt way to buy votes from various senators).
and so forth. We have accumulated decades of policies that favor the wealthy, and as a result the income and wealth gaps have exploded.
If you want to decrease asset prices, tax them (without loopholes) and see their valuation drop real fast, or slow - depending on tax rate.
Just remember to equitably distribute a part of proceeds so you're helping, not hurting the poor.
And again, I don't mean to be inflammatory (well ok, I do), but I really feel that constantly reflating asset bubbles for the rest of time, rather than accepting a one-time severe penalty whose moral hazard applies only to people who need things for their use-value, really is a Sunk Cost Fallacy that amounts to throwing good money after bad.
Debt forgiveness is not nearly as simple and positive as people believe. It often winds up hurting the people it was meant to help and having long-term negative consequences.
For instance, birth rates are dropping because young adults cannot afford a house, which in term means they have to rent against higher prices which means they have less income to actually put into the economy.
What will we do once we have a generation which doesn't have any wealth and doesn't own a place to live? People who have little to show for it after a lifetime of working while subsidizing those who own the properties they live in is not a situation you want society to be in.
1. Split multiple ways due to multiple children. 2. Sold to finance retirement living.