What would an investor need as incentive to do that? A return of course

How's this for a scenario:

The US gradually weakens its dollar by reducing their interest rates. The weakened dollar starts making manufacturing much more profitable than before. Countries start investing in manufacturing industries in the US. The US becomes a net exporter to China's and India's up and coming middle class. Asia and the US reverse roles in the future. Oh yea and the US continues to print money and pay down their current debt with inflated dollars substantially reducing the real cost of the initial debt. Paraphrased from Mr.Paulson from treasury I believe.

Cheers