UK cheats and cheats indiscriminantly. The FedEx'ed a package of money to Chris Mills around the time we were getting raked over the coals by the NCAA in 1992.
There is no doubt in my mind that they are crooked now, too--but they've got very good mechanisms for pushing the envelope to the limits while still maintaining plausible deniability.
But at some point, the devil is going to get his due. There is no doubt in my mind that just like at umass and memphis, Cal's willingness to bend the rules is going to catch up to UK, and they'll have to vacate a final four [again, just like umass / memphis].
Yet another example of how ineffectual a governing body the NCAA is.