My idea isn't so much to propose a single solution to the worlds economic problems, but instead to ask: what else might digital currencies do?

I don't know of anything else being proposed that works in a nonlinear way, and I don't know if the idea is even on the table as a possibility. I'm hoping that putting it on the table might give other people who can penetrate the complexity ideas for how to make the system work.

That said, I think the transaction types I list are fair intuitive. When I'm going to make a purchase, I have some options: I can pay a lump sum directly, or I can engage in an extended relationship of support, for which I can specify the duration of time, and the amount of support I'm willing to give it. There's different ways that support might work, but that's the gist.