ROME (Reuters) - Europe risks wasting more money for nothing if it keeps pumping billions into the ailing Greek economy, the head of Pimco, the world's largest bond fund, said in an interview published on Sunday. (http://feeds.feedburner.com/~ff/reuters/topNews?d=yIl2AUoC8zA) (http://feeds.feedburner.com/~ff/reuters/topNews?i=5U5SoHeDrG4:ffXD0C5jo6o:V_sGLiPBpWU) (http://feeds.feedburner.com/~ff/reuters/topNews?i=5U5SoHeDrG4:ffXD0C5jo6o:-BTjWOF_DHI) (http://feeds.feedburner.com/~r/reuters/topNews/~4/5U5SoHeDrG4)