Unlimited upside debt and debt tax autopayment
The risk of debt is that someone can default on their debt, but that person shall eventually earn money, we can guarantee repayment of debt by taxing that person after essential expenses and repaying the debt without the debt growing unsustainably
The problem with debt is it is punitive during failure.
Failure is the default behaviour of society. Most things fail for one reason or another.
We shouldn't penalise failure due to it penalising new things from occurring.
If some company borrows £1 million and its venture fails, it should still pay back the money, after expenses, slowly.
In return for this guaranteed return of capital and the chance to try again, you shold provide unlimited upside. So rather than charging interest on money you charge interest on success. So you can claim 20% of profits.