For perking them to work you'd need to have an actually painful price. Say, start with 500 perk points added to the base price and multiply it based on the current perk multiplier. So an Me262 would have a price of 700 perk points, a Spitfire Mk XIV would have a perk price of 545 and a La-7 or P-51D would cost a mere 500 perk points, all subject to perk multiplier cost increases.
I hardly have a horde of perk points by the standard of AH and I wouldn't even feel a price of 4. I regularly earn four to five times that in a single flight and I am a bit above average at best.