<p>September 23, 2006 -- World leaders can rant all they want at the United Nations - as long as its diplomats continue to spend big bucks here, Mayor Bloomberg said yesterday.</p>
<p>"If the U.N. left, from an economic point of view, it would be a disaster," he said on his weekly WABC radio show. "Tens of thousands of people would lose their jobs. The trickle-down effect - stores, restaurants, builders, real-estate prices - would be devastating for this city."</p>