I'm not sure, but I don't think the gov't ever intended to sell all the GM stock at once. It would be dumb of them to do so, if the goal is to get as much money back for the taxpayers as possible. There's a difference between a phased sell-off of the stock and the government "suspending" sale of the fed-owned stock.
Apparently you're privy to information that I don't have about how much stock the UAW has, how much they bought it for, and how much they're selling now.
Of course, I don't have the crystal ball that lets you "know" the GM stock is going to go down in the future and cause all the things you predict. To the contrary, I think the gov't is hoping the rest of the stock will go up, to allow the remainder of the stock to be sold at a break-even price or even a profit, instead of a loss.
As far as all this being a "giveaway" to the UAW, I'm sure the UAW would laugh its butt off to hear that. The GM reorganization was a big kick in the teeth to UAW's pensions. This hasn't been a picnic for the UAW in the least.
As far as letting GM fail goes, we've got a massive number of suppliers and vendors out there to GM who are still in business because thinking like yours was rejected. The armchair bloggers don't like it, but the people who actually know about economics[/i] are pretty much unanimous in agreing that the country has been better off as a result.
bd