I'm going to interrupt my rant on climate change to tell a great joke I heard years ago.
After shipwreck, three world-renowned academics find themselves marooned on an island with a case of canned food. As they start to get hungry, they brainstorm on problem of opening the cans.
The first academic, a chemist, says, "If we leave a can in the sun, Boyle's Law tells me that the contents will increase in pressure and the can will burst."
The second, a mathematician, says, "We'll need to know about the how the can is made so that we can determine how best to locate it so that it will burst in the shortest period of time while spilling the least amount of contents."
The third, an economist, says "Let's just assume that we have a can opener..."
The point here is to illustrate that economists, especially academic ones, make a lot of horribly flawed assumptions about the state of things, specifically considering variables as constants for the purposes of evaluation.
Now, consider the impact that economists have on government.