There is know proof that the uptick rule or shorting a stock actually brings a stock down. To say look at the dates when the uptick rule was instated and todays stock prices is not a real reason simply because a lot of things changed during that time aswell. Lehman didn't go bankrupt because they were being shorted, they went bankrupt because they had risky investments. Washington Mutual didn't have a bank run because their stock was being shorted it's because the bank wasn't conservative with their money and both these insistutions weren't making any money. That is why investors short them. You also got to consider that some Joe and Jane investors make money of shorting a stock.
The average Joe and Jane investor should know there is risk involved when they put thier money in the common equity market. Plus if they are diversified like any smart long term investor they wouldn't be in such a big mess.
Your idea that the uptick rule will save the economy is wrong, "what came first the chicken or the egg" is relavant to the topic, what came first the solventcy issues or the short sellers?