By Mark Kleinman Mark Kleinman is Sky News’ City Editor and writes a weekly column for City A.M., this week on changes to banker pay, what next for Foxtons and job cuts at the City’s mid-cap brokers Goldman move may not deliver post-Brexit bonusYou have to hand it to Goldman Sachs: it’s not afraid to make decisions which reinforce the ‘giant vampire squid’ trope which has dogged it for the last decade. So often a frontrunner on pay in a literal sense, the investment bank is also setting the pace from a policy-making perspective. As I revealed on Sky News last week, it has decided to lift the b…