Bono also addressed criticism that the move contradicts his history of charity work. He insisted: "Because you're good at philanthropy and because I am an activist people think you should be stupid in business and I don't run with that." The Edge added, "So much of our business is outside of Ireland so it is ridiculous to make a big deal out of it."
Source: NME News Bono on tax
I get why people like to argue about what a rich person does with their money - but when we have almost no idea of where their money is spent and what percentage of it is given away, why bother wasting time on it?