By Laura Forsyth Where the City’s movers and shakers have their say. Today, it’s City A.M.’s own editor Andy Silvester with the pen.It would be churlish to complain about David Schwimmer’s reported pay bump. After all, since he took the reins of the London Stock Exchange Group in 2018, the firm has shown significantly improved performance on just about every metric, successfully integrating Refinitiv and signing a deal with Microsoft to enhance its data offering. As a paper we’ve been just about alone on Fleet Street in advocating for higher pay for successful chief executives, so we can hardl…