https://www.barnstormers.com/cat_search.php?headline=MIG&bod...

Consolidation was an inevitable result of the end of the Cold War and massive cuts to defense spending. The defense industry was _encouraged_ to consolidate because the alternative would have been bankruptcy. Obviously, time has shown that this consolidation was bad for the industry and the government, but a lot has happened in the last 35 years that would not have been foreseen then.

> to the point where incentives aligned to financial and regulatory capture / stasis (and pilots only certified on one type of flight vehicle), rather than someone skilled to operate a general aviation vehicle

The type rating structure really has quite little to do with aerospace industry consolidation (if anything, the industry is too fractured to allow for more generic type ratings). Aircraft, their systems, and their flight dynamics are different enough that trying to create a more general type rating would really be impossible. What you do see are families of aircraft which either completely share a type rating or require very limited additional training to maintain a rating for multiple family types (e.g. all 737s, 757/767, 777/787, A32x/A33x/A35x).

Single piston GA aircraft are really the exception, not because they all share the same behavior (there is a truly wild range of flight dynamics and avionics), but because the GA community (particularly in the US) is so large and established that requiring more training/experience is politically impossible. So long as GA accidents don't kill too many bystanders, this will remain the case.