Are you suggesting a government agency may not be trying to promote and foster growth in a private industry as advertised, especially one that promotes personal freedom? pfff... Utter foolishness.
I agree with Gatordev and the sentiments of this thread, something is really odd about about GA pricing. I understand the industry essentially shutdown for twenty years and that unlike the car-makers they can't cheapen everything down to the bone, but when it comes down to it there isn't that much to a 172. Although one thing we do tend to forget is how much overhead they have to cover per unit sold. This chart was
very enlightening-
That being said there are a few exceptions to the half million dollar C-172. I fly an American Champion Aurora (Citabria) which is a great little plane. It doesn't set the world on fire speed wise, but it's certainly fun and challenging to fly. Anyway, a new one can be had for a little over 100K depending on the options. Still expensive but not completely out of the realm of affordability for an "average person."