No it doesn’t happen all the time, and if you are running for president, you should damned well have done your own self investigation to find out about this sort of stuff, because stuff like that is going to prompt questions and you better be ready to answer them.
This “it happens all the time” is total nonsense. Really? I know a lot of upper level managers and execs, and a company paying out to an employee over allegations against them isn’t Common in the least.
The fact is it happened and he should have known about it, and been ready to deal with it, its called doing your due dilligence.