Arnesen's resignation is the second high-profile departure announced by the club in a matter of weeks after long-serving assistant manager Ray Wilkins left earlier in the month.
This is because if they did, the likelihood would be that Spurs would then have to sack sporting director Frank Arnesen, new boss Jol and probably some of the coaching staff as well.
"I think Frank Arnesen, having secured a very good job in certain circumstances, has been rather disloyal to Tottenham - if he now needs to go and he is obviously going for one reason, " added Pleat.
The forward made known his desire to play for Chelsea after the club's sporting director Frank Arnesen was reported to have met his agent Ribeiro in June, once it was announced Scolari would be taking charge of the Blues.