[Doubling in 20 years? The US "debt bomb" alarm rises again: the market will collapse sooner or later without restraint!] Joao Gomes, a professor of finance at Wharton Business School, the world's leading business school, said recently that if the US government does not slow down its spending as soon as possible, soaring debt may damage the market. Gomes warned in the latest interview that the $34 trillion debt burden of the United States may bring trouble in the future.