Why will you not qualify if you buy 500 hours?
Explain me what makes 500 hours that you buy less valuable experience hours then 500 hours you work and get paid!
Besides the morale issue, how does this make a difference.
500 hours on type as FO is 500 hours no matter how you do it, paid or pay for it!
Please have some substance to your argument!
You log book will have 500 hours logged on a 737 or A320 - also from what I have heard many pilots get hired with the airline they fly with, because you have invested in your own line training and type rating, as longs as you are of the right stuff it makes little sense to let you go unless you get a better offer.
Point is that at least you will get an offer with 500 hours logged on type, with type rating you will get 0 !