the sentiment might exist, but that doesn't mean it's based on facts

that discussion you linked to can be broken down into:

- people upset because they thought Wikipedia was almost bankrupt and it turns out its not (though Wikipedia never claimed to be in its fund-raising)

- people upset because they see too many requests for donations

- people upset because Wikimedia execs are getting "high" salaries (though they are much _much_ lower than at private co's)

- people upset because they think Wikipedia spreads "left-wing ideologies"

None of this has anything to do with "corruption".