Bernie Sanders has a plan to erase student debt by taxing Wall Street. But industry watchers tell us

Senator Bernie Sanders has proposed a financial-transaction tax on Wall Street to support his plan to make college free and pay off all outstanding student debt. Other legislation also proposes such a tax to deal with inequality.  Business Insider spoke to a handful of industry watchers, who outline their case for why a transaction tax could ultimately hurt Main Street and capital markets alike. Read more on Markets Insider. When Bernie Sanders revealed that his proposal for free college...