In an excellent article on Huffington Post, Dean Baker writes that a tiny tax on financial transactions would be a good thing for everyone concerned except Wall Street. It's doable, according to Baker, if the White House is willing to do a full Snowden, and put pressure on potential tax haven countries the way it has put pressure on other countries to prevent Edward Snowden from getting asylum. http://www.huffingtonpost.com/dean-baker/edward-snowden-and-financ_b_3637148.html