There are absolutely NOT 142,000 airline pilots in the US.
Also age 65 will not create a 5 year stagnation...many current pilots will not have the stamina or desire to continue that long, and for those that have retirements, they will still be eligible at age 60 (unless the union agrees to extend that too
). Out of those pilots that do wish to continue, not all will be able to hold a medical. My guess is a hiring slowdown equivalent to a a two year stagnation (just a gues of course).