Both players arrived at Old Trafford arrived with huge reputations but failed to deliver, with Sanchez now on loan at Inter Milan and Pogba expected to depart this summer.
And Van Persie thinks the club got their recruitment strategy completely wrong.
"That's one way. It is risky. If such a player gets injured or does not fit, the whole team is vulnerable. While having a philosophy like Liverpool and not Manchester United creates enormous collective power.