Because economists don't agree. If they did, there would be one economic theory and we'd all follow it.
Scientists have a similar problem. The job of a scientist is to challenge conventional wisdom and question knowledge as we understand it.
Naturally, when I heard Obama say:
Economists from across the political spectrum agree that if we don't act swiftly and boldly, we could see a much deeper economic downturn that could lead to double-digit unemployment and the American dream slipping further and further out of reach...
...I laughed.
It presumed a world full of Keynesian economists, economists who believe in government intervention.
Luckily, Politifact debunks this notion:
"...But we do know that Obama is wrong when he says there is "no disagreement that we need action by our government." Clearly, there is disagreement. We rate his statement False."
