The issue is that the solution is bigger than the problem.
Suppose the insurance companies insist on a minimum 1,000 hours flying experience for all First Officers, as they did when I started out.
All very well, but how on earth would you satisfy the demand for pilots if you had to wait several years for them to gain the shortfall in hours after leaving their Flight Academy with only minimal experience?
Where in the World would they work to gain all that experience?
The industry has evolved in a way which now makes it virtually impossible to bring back the old-style training/experience requirements.
The answer is that, for the foreseeable future, there is no answer.
Whereas at one time the issue was that the aircraft had to be certified as 'Perf A', it is now becoming a situation where it is the pilot who needs to be so qualified - as it is a given that modern aeroplanes have the performance required to comply with all that is asked of them by the regulators.