Current need not be generated inductively, it can arise naturally ("bootstrap current"). There have already been experiments with as much as 85% of the current

Current need not be generated inductively, it can arise naturally ("bootstrap current"). There have already been experiments with as much as 85% of the current coming from this mechanism. As far as I know, there's no reason to absolutely rule out a bootrap fraction close to unity. If you have information that does rule this out, I would like to hear it, since I hear this claim repeated often. Edit: there's also lower-hybrid current drive. This combined with boostrap means that ITER may be able to operate at steady-state.