http://www.washingtonpost.com/wp-dyn/content/article/2008/11/24/AR2008112403211_2.html?hpid=topnews&sid=ST2008112403295&s_pos=
Eager to reduce U.S. dependence on foreign oil, Obama proposed a $7,500-a-vehicle tax credit for plug-in vehicles during his presidential campaign. Roughly half of Americans don't earn enough to take advantage of such a big tax credit. (A head of household would need to earn almost $50,000 to have a federal tax liability that large.) Many others don't have the cash to purchase an expensive vehicle then wait for a federal refund. To spur sales of new vehicles, the price must be reasonable at the point of sale, say many industry experts.
Womack warned that it takes time to design a new vehicle, change assembly lines and then turn a new product into a profitable one. "For anything that's really new it's still about four years," he said. "To get your money back, you need to make that product for eight to 10 years with only cosmetic changes."
Helping automakers over that hump may take more money and patience than Congress or its taxpaying constituents have.
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I don't think the $50,000 per yr it would take to take full advantage of the tax credit of $7,500 Obama has proposed, is anytha problem. That would still leave many more households than the number of Volts GM could build, initially. The real question is will GM be able to make anough money selling other cars to keep selling Volts at a loss for a few years and stay in business?
IF the Government wants the Big 3 to build more fuel efficient cars the Government must hold up it's end of the bargain and pass a carbon tax on cars to disincentivise purchase of gas guzzlers. The car companies can't force people to buy lighter more efficient cars if large numbers keep wanting SUVs.