Only four out of 20 Premier League managers are English, compared to 11 of the 18 Bundesliga bosses who are German.
He believes if they don’t, the English national team and quality of English coaches and players will deteriorate.
For Sutton, Swansea appointing Bob Bradley rather than a British coach was the straw that broke the camel’s back.
He wrote in Heat Street: “Bradley certainly wasn’t hired because of his Premier League track record. He doesn’t have one, not having managed in Britain before.