Why is there a recession?
If we could figure that out, we could eliminate recessions. But, we can't and therefore we don't. Economies run on the margins, and when enough people, for whatever reason, cease to buy durable goods, then the economy begins to stall. Sometimes, government restricts the money supply and that effects the economy. Often after a sustained boom, people exhaust their credit, and that causes them not to buy durable goods.
When times are good, people tend to live good, and far too many live beyond their means to sustain their lifestyles. They borrow, until they can no longer borrow.