I don't believe his approach with managers is anything to do with saving money on the salary.

if there was a proven manager who could guarantee us promotion then I have no doubt that Tan would be happy to pay for it. unfortunately they don't exist.

proven managers are sacked all the time, the average length of a managerial job in the league is about 18 months I think, most of them experienced.

Often managers who have been effective suddenly one day aren't, even at the same club, so we can't be in the situation where everything revolves around the manager.