A permanent base on Mars would have a number of advantages beyond being a bonanza for planetary science and geology. If, as some evidence suggests, exotic micro-organisms have arisen independently of terrestrial life, studying them could revolutionise biology, medicine and biotechnology.
The rest of the world needs the US economy and financial system to recover in order for it to revive. We remain at the center of global economic activity with financial and trade ties to every region of the globe.