John Mauldin has written an excellent article titled Economic Singularity. Singularity was originally a mathematical term for a point at which an equation has no solution. In physics, it was proven that a large enough collapsing star would eventually become a black hole so dense that its own gravity would cause a singularity in the fabric of spacetime, a point where many standard physics equations suddenly have no solution.
Beyond the “event horizon” of the black hole, the models no longer work. In general relativity, an event horizon is the boundary in spacetime beyond which events cannot affect an outside observer. In a black hole it is “the point of no return”, i.e., the point at which the gravitational pull becomes so great that nothing can escape.
Mauldin´s conclusion: “A business-cycle recession can respond to monetary and fiscal policy in a more or less normal fashion; but if you are at the event horizon of a collapsing debt black hole, monetary and fiscal policy will no longer work the way they have in the past or in a manner that the models would predict.”
“There are two contradictory forces battling in a debt black hole: expanding debt and collapsing growth. Without treading again on ground covered in many past letters, let´s take it as a given that if you either cut government spending or raise taxes you are going to reduce GDP over the short run (academic studies suggest the short run is 4-5 quarters). To argue that raising taxes or cutting spending has no immediate effect on the economy flies in the face of mathematical reality. Note that I´m not arguing for one approach or the other, just simply stating that there will be consequences, either way. The country might be better off with higher taxes and/or more spending, or the opposite. But those choices are going to have consequences in both the short and long term.”
“Second, there is a limit to how much money a government can borrow. That limit clearly varies from country to country, but to suggest there is no limit puts you clearly in the camp of the delusional.”