Apart from tax payers money is there no other ways government generate revenue?
Sure, but I'm at least 90% sure--I'm no economist, so keep that in mind--that even if the US had abundant natural resources that it could export, that still wouldn't cover the debt that it owes. I could be wrong, but somehow I doubt it. And taxpayer revenue? So many people I know can't even get menial jobs right now, so raising taxes in the face of a lousy job market isn't a great long-term strategy.
It is ugly times ugly here in the states.