US Debt is a runaway train going downhill

US debt financing is one of the largets components of the budget and contributes to exacerbating the existing budget deficit problem.
How long can markets continue to support US government fiscal policy. What are the areas where savings can be made.
What ammunition does the Federal Reserve have supporting the markets and the economy in the event of an unwanted loss of market confidence in the US $.
The Swiss constitution incorporates a provision limiting any Swiss Government to spend more than the tax recepts over an term of government. Germany also implemented similar law.
which are best assets to hold in the event of a crisis of market confidence in the US$.
Is the Chinese economy immune from contagion ?
Should we protect ourselves by increasing our allocation to CHF assets ?