Can someone corroborate this claim? Cause any way you look at it, these salaries are unethical for a non-profit organisation.
The reason they shouldn't move their HQ somewhere cheap is the same reason Apple or Google shouldn't: there isn't the concentration of tech talent there.
The implication of your comment is that Wikipedia wouldn't function it if didn't generously compensate its executives because it would fail to attract competent staff. That view has been vindicated by, for example, European left-wing parties who cap their politicians' and administrators' salaries at the national median. No evidence suggests that left-wing parties therefore attract less qualified candidates than right-wing parties.
https://upload.wikimedia.org/wikipedia/foundation/e/e4/Wikim...