All theories are subject to testing!

Quote Originally Posted by Thorne View Post
Not quite! The theory doesn't WORK, it EXPLAINS! Gravity worked long before there were any theories about it.

But just imagine what would happen if, for example, scientists discovered that gravity depended upon a certain number of people spending a certain amount of their money over a certain period of time. As long as those conditions persisted, gravity worked. Then, along comes some idiot movie/sports star and says that, no, people would be better off if they spent MORE money, faster. Suddenly gravity no longer works! The theory may be sound, but the application of the theory has been sidetracked.

This is kind of what happens with economic theory. Under the right conditions, those theories will explain what's happening. But when conditions are altered, generally by some pretty face, or a politician, or any of a number of absolutely inane possibilities, the theories can no longer be used as models. So the economists say, given a population of X, which has a disposable income of Y, performing Z actions will help the economy improve. Politicians say, great! Let's do that, and pass the required laws. Along with new tax laws, and new spending bills, and more appropriations, all of which alter the value of Y, making the whole equation worthless.