Mr Moose
What the hell are we supposed to tell the kids?
Half the problem there is selecting "Corbynite" candidates, who as you and Bush state go on to get shot down and who come from a small talent pool anyway.
They should really be looking to get in people who have considerable experience / achievements outside of politics, which would present much more of a danger to the current PLP (and by extension, to a Tory Party that is increasingly dominated by the same sort of political obsessive), be less of a threat to the current leadership (at least in terms of not making every selection contest a war that they lose), have a better chance of winning by-elections and gradually improve the quality of debate in the Commons (and further down the line the quality of minister).
Tricky. I'm not sure that Shami Chakrabarti's performance in her role suggests this would be a rip-roaring success for MP candidates. Success and achievement is also pretty likely to = establishment.