FAA is going to demand pilots have 1500 flying hours in order to fly airliners, even as a co pilot. That's a lot of time. That's 38 weeks of flying 40 hours every week. Operating or renting a light plane costs better than $100 an hour. So 1500 hours will cost $150,000. Few people have that kind of money.
Used to be, guys would get a job flying co pilot and build up their hours without having to pay for the plane and fuel. FAA is shutting that off.
The airlines are wondering where pilots are gonna come from.