What makes you think that the Americans want a constitutional Republic?
So if we only had the right hands on the control of the government gone wild, we could step back from the abyss? I think you underestimate how hard American and many on FR will oppose your efforts.
To bring the situation under control, promises made by the government to the people will necessarily be broken. Looking at a government one tenth the size of present government may allow us to keep a few of the promises to the most destitute.
In 1950 every retiree on social security was supported by 15 active workers. By the end of 2010 there were only 3.3 workers for each retiree. The government believes there will only be two per retiree by 2025. A Wall Street Journal editorial a couple weeks ago highlighted the fact the government is facing not a $16 trillion debt but an $87 trillion debt if you take into account the unfunded liabilities of social security, Medicare and Medicaid. If you fast forward 20 years until all the boomers are retired that soars to $202 trillion according to Boston University.