There's reasonably broad agreement that Wall Street has become parasitic - extracting wealth a lot as opposed to helping it get increased.
For one statistic, 70% of all trades done now are by computers done at high speed to try to take advantage of fast access to information to quickly make a little - a lot.
That has little to do with the purpose from society's point of view for stock markets to help capitalize businesses and grow the economy.
Whether talking about that or other activities, some sort of 'micro tax' to help discourage unproductive and even harmful actions might make sense. Europe seems to favor it:
http://www.commondreams.org/view/2011/06/11-1
For one statistic, 70% of all trades done now are by computers done at high speed to try to take advantage of fast access to information to quickly make a little - a lot.
That has little to do with the purpose from society's point of view for stock markets to help capitalize businesses and grow the economy.
Whether talking about that or other activities, some sort of 'micro tax' to help discourage unproductive and even harmful actions might make sense. Europe seems to favor it:
http://www.commondreams.org/view/2011/06/11-1