[bratticus]

Back in 1999-2000 the US Federal government also did a cash injection and then stopped. Some reports about the long-term effects.

$this->bbcode_second_pass_quote('', '[')b]Will money supply increase cause inflation?
By Jon E. Dougherty / WorldDailyNet / Dec 15, 1999

The Federal Reserve's record increase in the U.S. money supply -- the largest such monetary expansion in its history -- in anticipation of Y2K-related financial problems may well lead to inflation, depending on how bad Y2K turns out to be, according to economic experts. ... "I just don't have another excuse other than Y2K to imagine why the Fed would flood the system, unless there is something that's happening behind the scenes that we don't know about," Hays said. ... "This huge liquidity is the reason for the big rally in stocks since October," said Hays. "It's a replay of the market's run-up exactly one year ago, when the Fed rushed to flood the system after the panic from the Russian loan default and the Long Term Capital Management hedge fund disaster." ... "People are not borrowing just to stuff the money in their mattresses," he said. "They borrow to spend and it ain't a coincidence that the stock market has picked up as the money supply has exploded."