straight to your inboxQ: Real Madrid, Barcelona and Manchester United, the three richest and most valuable clubs in the world over the past decade - none of them are spending, so why all the criticism on Manchester United? Should this not maybe be a warning to the entire world of football that financial things aren’t so black and white at the moment?Samuel Luckhurst: It is a fair and valid question, and one that might get mentioned in Ed Woodward's investors' call later this month (due to be the