The global competition in taxation is a good thing, IMO.
Am I exploiting a loop hole by deducting my mortgage interest? Am I exploiting a loop hole by deciding to hold an investment an extra day so as to get long-term capital gains treatment? Am I exploiting a loop hole by buying a computer or washing machine on "state sales tax holiday weekend"?
Maybe you'd argue that I am, but I believe that I'm just reacting rationally to the incentives offered. (There might be a valid government reason to encourage home ownership, long-term investing, or to spur local purchases in the economy. Must I ignore the incentives to act in a way that governments have decided to encourage? If not, why is it different for GOOG?)
"Anyone may arrange his affairs so that his taxes shall be as low as possible; he is not bound to choose that pattern which best pays the treasury. There is not even a patriotic duty to increase one's taxes. Over and over again the Courts have said that there is nothing sinister in so arranging affairs as to keep taxes as low as possible. Everyone does it, rich and poor alike and all do right, for nobody owes any public duty to pay more than the law demands." Judge Learned Hand, 1935