MPs have launched an inquiry into the UK’s tax system after the government was accused of allowing Google to pay too little in a £130m deal. The House of Commons Treasury committee announced that it would examine whether a radical shakeup of corporation tax was needed, amid concern that Google has been allowed to get away with an effective rate of 3%.The inquiry is not directed at Google, but will investigate the UK’s shrinking corporate tax base more widely and whether HMRC is doing enough to tackle avoidance. It will ask whether there needs to be a radical shakeup of the system, and whether business taxation could be based on turnover rather than profits.