I think you could say that they are funded well, in the sense that no one should be paying out of pocket, but that is different than saying that they get paid well. It depends a lot on school, location, and (possibly) subject.

I think the typical engineering PhD major makes close to the equivalent of 12,000 Pounds. It's usually around 16-18 starting from what I know. When you're doing something that benefits mostly yourself (getting a degree), making that kind of money is getting paid well, in my opinion.