Thanks for the great post ?...!. I've been reading this forum for several months now, and it's fascinating economics lessons like this that keep me coming back (and today I've even signed up to post!).
There's something I don't understand about your post though (not suprising - I know very little about economics) maybe you, or someone else, could answer it for me:
So are you saying that people will be spending so much on interest that they won't have money to spend on other things, and so the economy won't grow? But the interest they're paying isn't dissappearing, it's going to lenders. Presumably the lenders then spend or invest the money, so doesn't it go back into the economy anyway?