See, I dont think those higher levels of protection even really exist anymore, not between WT teams at least. Sure, a small fish gets caught every once in a (long) while. But the UCI realised a long, long time ago that actually catching a WT-level rider (let alone someone with Vingo's or Pog's status) is incredibly damaging to the sport, and therefor, their income.
Remember Armstrongs return? The UCI quite literally begged him not to come back. It was his hubris that forced their hand in the end. If the UCI had it their way, he never would have returned and more importantly to them, he never would have been exposed.
Sure, I agree, that it doesn't look like the UCI has much interest in catching any big names at the moment, but there are probably still differences in how much they're willing to defend certain teams and riders, in case the police, media and/or anti-doping authorities should suddenly get hold of any incriminating evidence (not that it seems very likely to occur these days anyway).