I don't know the specifics in the UK, but in the US this was a common belief among a certain political class in the 1960s and 70s. You had skilled blue collar laborers making the equivalent of $30/hr and politicians and some economists felt that was too high. Paul Volcker very famously carried around a card with US autoworker wages printed on it.

Parent commenter has been drinking gallons of right-wing koolaid.

Next thing they’ll probably say is they are going to be forced by the government to share their apartment with an illegal immigrant.