"Disinterested" does not mean what you think it means. It does not mean "indifferent or "apathetic." On the  contrary, it means "objective," or "interested but suspending judgement before jumping to a conclusion." Our electorate may be, and clearly often is, "uninformed," but it is by no means "disinterested"!! 

In my view, we have real problems on both sides of the issue. We have sub-par, pork-barrelling politicians AND the sort of electorate you describe, though of course there are always exceptions. And the solution in both cases is to *address* the problem, not to turn our backs on it. We must find find ways -- somehow -- of better informing the voting public AND of promoting a more generous and magnanimous attitude to public affairs in our "best and brightest." We are in desperate need of their help.  -)