Cake? Maybe. Equal-population single-winner firdt-past-the-post political districts, no. But that's okay, because single-winner districts don't practically support more than two competitive parties, especially when you have separately elected statewide and national executives rather than a parliamentary system.

Of course, get rid of single-winner FPTP districts, and you not only can support more parties, you make gerrymandering mostly pointless, even if you do still have districting.