Sliding scale payment systems

Wanted to start a conversation to see how this idea lands among the folks of this online community.

I am a university-educated, full-stack web developer by vocation. I've put years into building an integrated understanding of the systems I use and I always opt to use the simplest tool for the job. As far as I know, my skillset is worth a lot of money.

Part of my trouble is that having a set price for my work means that I would be biasing my services towards people who can afford them. I would much rather work for the type of person who can't afford to pay me - this is why I quit my job at a consulting firm.

The best answer I've found is to ask for payment on a sliding scale. I think I would be comfortable asking for up to $100/hour, and going as low as $20 (approximate living wage where I am) unless someone legitimately cannot afford what I offer, in which case I can do the work for free if I feel like it.

I would like to organize payment around various checkpoints & deliverables. That way, my client can choose how much to pay for a given task and then revisit payment based on performance and efficiency.

What do you think, Tildeans? I bet y'all think I'm crazy and you're right. But would you hire me, if I was a real-life person in your community?