alt Hacker News> The "Debt to whom, and what outcomes does that person value?" question is important.
It may be, but it is one you, the employer, can easily ask during the interview. If a prospective employee doesn't align with your values, you don't have to hire them, and thus won't have to make them any promises to deliver anything that you don't feel comfortable with. This isn't only theoretical. "Cultural fit" is considered by a large swath of employers to be one of the most important aspects of hiring.
I know the typical HN account loves to over-engineer solutions to mundane things, but you really don't have to invent some new type of accounting for this. All you have to do is talk to the people in your life.
If the debts were spread around evenly, I'd agree with you. But the vast majority of debt is not peer to peer, but instead goes through a bank. If you're going to restrict a bank from using your mortgage to enable loans for endeavors that will hurt you (or selling the debt to somebody who will do this), I think you do need a new kind of accounting.