I don't see what the issue is, or how it's cheating. It's common for the pilot to be an ex- 'pro' or olympic track cyclist (Craig McLean, for example) and both riders are doing the work. The pilot must always be more powerful and faster than the stoker, so the pilot doesn't hold them back; but for the top competitors at least, it's not as if the pilot is just dragging any old stoker around, so it's not really comparable to you and Hoy on a tandem.
If you think about it, there will always be a performance incentive for the stoker to be as capable as possible; a Hoy dragging a blind passenger around is not going to be competitive against a strong pilot / stoker combination where both are contributing as much as possible.
There's also a lot more to it than just power; there's a lot of skill involved, not least in controlling the tandem which is a big old pig of a thing to ride on track, co-ordination between pilot and stoker, etc. Every little wobble from the stoker, or stoker and pilot doing slightly different things when they should be doing the same, can have a significant effect. Both need to be in harmony, just as the elements in a pursuit team, say, have to be in harmony.
Mind you, I think there's a lot of mileage in the way
@Crackle suggests doing it...