"How many other drivers like Rader are out there who ignore administrative license revocations and rarely, if ever, do jail time"

I don't think you'd like that answer.  To further compound the problem, I've seen instances where individuals had be cited, 15+ times, for driving without a license resulting in a judgment against them and then their fine sent to a collection agency.  That collection agency is out of state.  None of those fines have been collected and this person had been cited with, again, driving without a license.  No arrest.  Just cited again for the cycle to continue again and again.