Should Average Pilot Experience Levels Of Each Airline Be Public?
No. The regulator should be held to account as each airline abides by the regulator.
Case in point, the FAA post-Colgan. But does 1500hrs maketh the pilot, probably not. That's a different argument.
An experience level league table without context is pointless. To add context would make the league table pointless as it would be a massive document. Ergo let the regulators do their jobs and hold them to account.
You say that transparency is part of improving safety and reducing corruption. Would transparency be meaningful in this area after all the replies you've had so far? Who is corrupt?
I'd bet that there are more commercial jet transport incidents & accidents attributable to folk with very high hours than very low hours. I sense a personal agenda here, as your point is moot.