I thought the whole premise of modern economics relies on the assumption that the economy has to grow. Time value of money implies that the money has to create

I thought the whole premise of modern economics relies on the assumption that the economy has to grow. Time value of money implies that the money has to create value -- in more specific term, if bank lend out $100 and want $102 back, without the economy growing the money supply can't have the extra $2 (printing more money without the economy growing cause inflation, then the bank will want more than $2 interest and it's the same, so we can ignore that).