The US government is making the same mistake as those who took out variable rate mortgages, Cramer said. They share the belief that they would save money with the low rates in the short-term, only to get slammed when mortgages were reset during the financial crisis.
Right now, the US is borrowing a lot of short-term money that comes due in a few years, rather than taking advantage of the massive demand for Treasuries — the safest place to put your money thanks to European contagion locking in slightly higher, but still incredibly low rates for the long-term.
Greece is having a massive liquidity crisis. The country has payments on its debt due over the next two years that are larger than its entire economy, Cramer said. It also has a solvency issue that the US never will, Cramer said. But the US could face a liquidity crisis in the future, when it isn't as easy for the government to borrow money.