Not necessarily disagree with you, but a pilot needs to build up the 1250 hours in order to be hired.
What do you think is the best option to build hours then?
CFI for 1250 hours and take controls about every 100 some hours and do 3 take of and landings every 90 days etc...
Tow banners up and down the coastline in severe cavok...
Pipeline patrol is probably pretty ok
135 perhaps but they want 135 mins as well.
Or a scenario where the prospect pilot can get 1250 hours in a jet with a senior captain who can teach him and build him in a good way.
Perhaps its time to bring back second officers or flight engineers.
The best option would be for the applicant to get real world experience. Go instruct, or banner tow, or survey, or ANYTHING until they get to IFR 135 mins, then go fly cargo single pilot, or fly charter, THEN go to an airline if they desire. Aviation is a HUGE industry but so many people seem to have tunnel vision for the airlines.
I didn't necessarily enjoy my time flying survey, but give a 500hr pilot a 172 for seven months and you'll see how quick they learn and build real experience. Flying a Skyhawk accross the country on your own, flight planning, dealing with ATC, flying in the most congested airspaces in the nation, all help build that experience.
At 1200hrs you can go get typed in a light jet, or fly a twin piston/turboprop and build more experience. Fly boxes or people, it doesn't matter. It's all a challenge and teaches you A LOT.
Your last point of "get 1250 hours in a jet with a senior captain who can teach him and build him in a good way." isn't realistic either. First off, no captain wants to babysit a 250hr pilot. Next, no schedule based on seniority would ever allow a senior captain to fly with a very junior FO. That junior 250hr pilot will be flying with new captains all the time.
It's not time to bring back SO's or FEs, it's time to understand that experience is worth something, and that those of us with thousands of hours of airline/charter experience are worth something. I can promise you that if regional airlines started paying real salaries, there wouldn't be a shortage for very long. I've personally worked with many people at my last gig who say they would love to go to an airline, but they can't afford a 50%+ pay cut.