IMHO, there's just not enough planes perked to make the perk system work.
I have nearly 400 perk points.
Even with plenty of perkies, I never fly tempest, CHog, or TA152. There's no challenge in flying those dweeb planes.
In fact, I hardly ever see any one flying these.
And when someone does, everyone tries to kill them. So they end up flying defensive most of the flight.
But let's say this idea is implimented, and everyone in the country with the least plaers can fly tempest and they do fly them, will that make a difference when the odds are 4 to 1?
I don't think so.
What I think will happen is the gangbangers will get more perkies because they'll be able to kill more perk planes.
So the effect is reverse of what you would expect, this system would favor the the country with the most players.
I can see it now 12 vulche kills in my F4U-1D all against tempests tyring to take off - wow wonder how many perkies I'll get with that.
It might be fun to implement - just to see how it plays.
Nexus