By which time, it would have served its purpose (yeah, I know, linked that one already).
Well, a better liar — that’s apparently an improvement, see? 
Sounds good… Too good to be true. 
They don’t deal in such nonsense.
Actually, if you look at the history of modern so-called ‘democracy’ — not the direct one, like those ancient Greeks or the Novgorod Republic had or the Swiss might still be doing, or the kind found in socialist states, but the so-called Western (bourgeois, if you will) kind, supposedly the only true one and the only model that everyone else is supposed to follow — if memory serves, its invention coincided more or less with with the industrial revolution, as a form of power where a government could be appointed and, more importantly, replaced, if needed, easily, without the mess of coups, revolutions etc, in order to serve the long-terms needs (considering the investment horizon of industrial projects and so on) of ‘scummy mega corps’, as you put it (hey, I don’t think just any pauper had even nominal voting rights initially — it was mostly for upstanding middle-class citizens and such, although I’m not sure at this point… gotta brush up sometime, perhaps). In this light, it’s rather clear that the quality of those politicians stems from the powers (including corporate ones, yes) that they serve and are funded by (including even those election campaigns and other… ‘political technologies’, as they are sometimes called, although that’s more or less the tip of the iceberg).