Small planes still run leaded fuels so the (rich) owners can save money not changing their engines. This is 50% of our current exposure, needlessly!
http://www.treehugger.com/aviation/leaded-gas-banned-around-...
http://www.treehugger.com/aviation/leaded-gas-banned-around-...
Also, most small-engine planes can already burn regular unleaded autogas. It's just the high-compression engines that require the lead. The FAA, AOPA and others are working on developing alternatives, but it takes time. Perhaps they should have done this sooner.
Your points about engines and fuel make sense, though.
I pay about $85/hour to fly and don't own a plane. If I lived in the USA it would be $68/hr due to lower gas prices. I think the majority of Americans can afford to spend $68/month on their hobby (assuming they flew once a month).
I also have to wonder where high-school students who drop thousands of dollars into their hobbies are getting their money from. Parents?
I often wondered the same thing, given that neither I nor my parents had anywhere near that much money to fritter away.
I think it comes down to parents directly or indirectly though. You can make a fair amount of money with a summer job and part-time job the rest of the year, when you don't have to pay for rent, food, etc.
It becomes harder to maintain a hobby once you have to move out and live on your own.
So they could change engines, but would rather continue to poison us to save the cost/loss of performance. AOPA is fighting against it in the bureaucratic way, via numerous stalling tactics, for 40 years now:
http://www.aopa.org/Media-Relations/Position-Papers/Issues-r...
If your toys cost as much as new cars, you are rich and can afford to stop poisoning us.
The majority of private pilots I've met are hardworking people (not rich) who love aviation. They either rent from a flying club or partnership, or own a cheap cessna 150/172 or homebuilt. You can buy a decent buck 50 for about $20k, which doesn't make you rich if you own one. The average HN programmer earns $150k+ if they work at Microsoft (like you), Google or facebook in silicon valley. That's fairly rich, and it's a bit hypocritical of you to be calling me rich when my income for the past few years has been around $40k. I used to earn over 100k 15 years ago, but I chose lifestyle over stress and being rich.
I pay $50/hr dry to fly a friend's plane, and he's not rich. He is retired and never earned much money during his career. He can only afford to own a plane because he was left money by his father, and also because his wife has a good pension. He absolutely loves flying, so that is what he has decided to spend his retirement money on. He drives a falling-apart car from the early 90s.
Getting back to the discussion: the high compression engines that run avgas tend to be in light twins, which are mostly used to train airline pilots, air-taxis, medevac, etc. There certainly are some rich people with high performance piston planes, but that is probably a minority. At the moment there simply isn't any viable engine replacement for these planes. AOPA is actually working hard with industry groups to find a drop-in replacement for avgas, which will work in all these engines. It's not an easy thing to do, as you have to make sure the new fuel isn't going to damage the engine, cause an engine failure, etc.
Perhaps they should have started looking for a replacement earlier. Part of the problem is that there isn't too much innovation in aircraft engines, in order to avoid possible problems and because it's very expensive to develop (and aircraft sales are a few orders of magnitude lower than car sales). Even new aircraft piston engines don't tend to have ECU/FADECs (or even electronic timing).
2) Small airplanes aren't necessarily expensive, so you don't necessarily have to be rich to afford them. For instance, there's a Cessna 150 in good condition for sale on ebay for $16500 right now.
3) The FAA is actively working on unleaded replacements.
4) Many small planes can already run on unleaded.
Something should probably be done about the use of leaded fuel in general aviation. However, trying to turn it into class warfare (while every single pilot I know, and I know a lot of them, is middle-class) severely hurts your argument.
I would still say "rich jerks" is overstating things, but there's not zero relevance.
Give me an electric powered tri (trash) cycle anyday.