There is some fear among fans that Salah could be sold for a world record fee this summer, after his record breaking goal scoring exploits.
But Lawrenson believes the club can survive a sale, if it does happen.
"The owners know that if someone comes in for one of their players with a fabulous offer, they won't want the player to go, but if he does, they'll give the money to the manager and say keep doing what you're doing, because he's going out and buying players and then he's making them better, because that's what he does," he told bookmaker Paddy Power News.
"I don't think there's many players, maybe none, who he hasn't worked with and improved.
"That's the sign of a really good manager."