I think the pool of developers who are not freelancers, are OK with part-time work, don't need more salary than you're paying them for part-time work (like they

I think the pool of developers who are not freelancers, are OK with part-time work, don't need more salary than you're paying them for part-time work (like they have a cheap lifestyle or are already well-off?), and won't continuously keep looking for more work is in practice just a very small number of people. Sure, there's some people that meet that description, but just not very many. There's a reason the labor market has evolved to the binary of either being a full-time employee or a freelancer on project-based assignments