That's the problem with working too many hours: you don't have any time to go look for other work and potentially charge more. It's very hard to get an existing client to pay more.
Yeah, you're right, but I'm stubborn. I won't move to where the work is - I have a family. I'm much much more productive if I'm actually interested in what the client is doing (... and that's hard to figure out) and I'm not particularly bothered about making top dollar - mid-dollar is OK by me.YMMV.