They pay bugger all percentage of taxes (vs income) in the UK and bugger all percentage of taxes (vs income) in the US. This has been setup by lobbyists and governments and others who like to see that these companies are employing people (who pay their taxes... supposedly) so it is all meant to balance out, at least that's what we have been told.
At least google DOES employ people, I am very tired of hearing how all the rich are "job creators" and need these tax breaks, because otherwise they will take their money somewhere else, and we will have large layoffs and high unemployment and the economy will be in recession and ...oh I guess they don't need their tax breaks anymore...
<<<<< it has a fold-away pitchfork and an (unlit) flaming torch in it