Why the actual **** do you think a politician would be better at running a city than a successful CEO?
You're just terrified that your personal gods are going to be shown to be the corrupt, inept morons that they really are.
One of the big problems with politics today is that the people who are drawn to power are precisely the people you don't want IN power.
Someone with business acumen enough to be CEO of a major company would usually not be interested in a "low paying" political appointment. It's a coup of note IMHO.
Using your logic Donald Trump is going to be the best US president because he runs successful businesses. The notion that just because someone is successful in business then they must be good in every other sphere of life is bogus - this, buy the was, is the same argument that was used to push Mamphela Ramphele down our throats.