A CANADAIR CL65 CAPT RPTS A BOOT PUMP WAS DEFERRED PER THE MEL BUT DID NOT HAVE THE CIRCUIT BREAKER PULLED AND COLLARED PER THE MEL.

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THIS WAS THE FIRST FLT OF THE DAY FOR THE ACFT AND FIRST FLT TOGETHER AS A CREW. I WAS ALSO RECEIVING A LINE CHK. IT WAS A VERY BUSY DEP TIME WITH ALL THE REQUIRED BRIEFINGS AND INSPECTIONS TO BE CONDUCTED. WHILE REVIEWING THE MAINT LOG; I NOTED MEL 28-23-01 FOR THE R FUEL BOOST PUMP. WHILE REVIEWING THE REQUIRED ITEMS WITH THE CREW I NOTED THAT THE CIRCUIT BREAKER FOR THE R BOOST PUMP CBP-2 (G10) WAS NOT PULLED. I CALLED MAINT TO VERIFY THE STATUS OF THIS DEFERRAL AND TO FIND OUT WHY THE BREAKER WAS NOT PULLED AND COLLARED. WITHIN A SHORT PERIOD OF TIME; LINE MAINT ARRIVED AND STATED THE FO SEAT MUST HAVE BUMPED THE COLLAR OFF AND PUSHED THE BREAKER IN. I ASKED HIM IF HE REALLY THOUGHT THAT THE SEAT COULD REMOVE A COLLAR AND PUSH A BREAKER IN. HE STATED 'YES; IT HAPPENS ALL THE TIME.' I HAVE HAD MANY INSTANCES OF THE WRONG BREAKER OR NO BREAKER BEING PULLED AND COLLARED ACCORDING TO THE MEL. I ALSO ROUTINELY HEAR THAT WHEN A BREAKER IS OUT THAT THE SEATBELT SHOULDER HARNESS MUST HAVE PULLED IT OUT. IT IS THEN PUSHED IN BY MAINT AND THE OP CONTINUES. IN THIS CAE; THE BREAKER TO A FUEL PUMP WAS NOT DEACTIVATED AND COULD HAVE SERIOUS CONSEQUENCES. I AM NOT SURE IF WE HAVE AN ISSUE WITH SEATS THAT SABOTAGE CIRCUIT BREAKERS OR MECHS THAT DO NOT READ THE MEL.