Strategic Partnership with US Miners: this would be an ingenuous way of doing so. The government could buy the Bitcoins mined in the US at an average price. This would benefit the miners with a stable price and the government limiting the market impact.
I can think of a few problems with this plan already:
- If market prices go up and miners have to sell at a fixed price (under market price), other miners will get more money and increase the difficulty. That means the fixed-price miners will mine less.
- If market prices drop and miners get a fixed price (above market price), other miners will drop out after which the difficulty drops. So the fixed-price miners will mine more.
There's a reason the price is left to the market.