Printing money from nothing and lending it out to make a profit -- banking -- is fine. Banking is a necessary thing. Bankers are credit intermediaries. They match borrowers and savers and mean all the capital created by an economy is put to its most productive use.
And there's a case for a well regulated stock exchange where people can invest in shares and even a derivatives market where firms and individuals can hedge risk and plan future costs effectively, insure against losses and so on.
Those things are all good. It's just when we use all the money we make to capture regulators and legislators and that's when things start to go wrong. A well-regulated noncorrupt financial system, great, a big plus for society. What we have now, not so good.
Bookmarks