the regionals will have to take a part of the burden for the shaping of their pilots into professional pilots. That is what should be addressed by the FAA.
That is a huge problem. Regionals are more under financial pressure than the legacy carriers. If they logically bear the brunt of air carrier training, then the burden needs to be shared with the eventual poachers, the biggies. If left alone, quite obviously they'll cut back to the bare necessity, along the line the regulator allows.
Sharing the burden might implicate a transfer sum, once the trained airline pilot changes to bigger carriers. That is what you're referring to that could be addressed and controlled by the FAA.
A problem not encountered in the US but popping slowly up along the rising airline powers is that such countries tend to have ambitious nationalisation programs. This brings with it some astonishing careers for locals, like ab initio (250h) pilots right onto T7's or 330ies and long haul operations.
They build up hours quite rapidly, but not even close the equivalent and needed experience. Still they operate into and share all our airspaces.
How can we address that problem? These countries 'own' their regulators and these will follow their masters voice .....
That might prove the ultimate challenge to the FAA and subsequently Congress, if such carriers continue their expansion and domination.