Microsoft has complained that Obama's attack on tax havens will challenge its competitiveness in global markets.
It is a monopolist. How could it lose competitiveness as a result of tax change?
As this analysis shows - the reality is that it is simply very good at tax avoidance: as a result it shifts the tax burden from those most able to pay in society (like Bill Gates) to these least able to pay.
Please don't tell us you're a responsible corporation Microsoft: by protesting you proved you are not.