FLC HDG DEV ON APCH TO AVOID WAKE TURB. ATC BROKE OFF THE APCH.

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WE WERE IN VFR CONDITIONS; BEING VECTORED ON A 25-30 NM R DOWNWIND FOR THE LOC RWY 24R AT LAX. WE WERE GIVEN A HDG OF APPROX 070 DEGS AT 2500 FT MSL AND 150 KTS. THE CTLR (128.5) FLEW US OUT (E) OF THE CLASS B AIRSPACE; THEN ADVISED US. HE THEN POSITIONED US INBOUND ON THE RWY 24R LOC TO LAX; BELOW AND BEHIND A HVY B747. WE HAD TO ASK HIM IF THIS WAS HIS PLAN AND HE SAID YES. WE THEN ASKED IF WE COULD DEVIATE N OF COURSE FOR WAKE TURB AVOIDANCE. WE WERE 20 NM OUT ON THE LOC; IN VFR CONDITIONS AND HE SAID NO; NOT UNLESS WE DECLARED AN EMER. WE WERE IN AN UNSAFE SIT THAT WE DID NOT FEEL GOOD ABOUT AND HE PUT US THERE. WE ASKED HIM FOR HELP BY ALLOWING US TO STAY N OF THE B-747'S FLT PATH UNTIL HE WAS BELOW US. THIS WOULD HAVE SAVED US FROM A POSSIBLE SNA SIT. I WAS FLYING THE PLANE AND DECIDED TO STAY 1/2 DOT N OF THE LOC FOR OUR SAFETY. THE CTLR TOOK US OFF OF THE APCH AT ABOUT 15-20 NM OUT; TOLD US THAT WE WERE NOT LISTENING TO HIS INSTRUCTIONS AND GAVE US A PHONE NUMBER TO CALL. HE BROUGHT US BACK AROUND AND WE LANDED WITHOUT ANY FURTHER PROB. WE CALLED THE NUMBER AND THE CTLR ON THE OTHER END SAID THAT THEY WERE FOLLOWING THEIR PROCS. HE ALSO SAID THAT OUR PROB WOULD GO NO FURTHER. I'M FILLING OUT THIS RPT TO MAKE SURE. PROB: THE BASIC PROB IS THAT EVERY TIME WE FLY FROM SBA; OR ANYWHERE FROM THE NW; TO LAX; WE ARE SLOWED DOWN SO THAT A HVY ACFT CAN BE PUT IN FRONT AND ABOVE US. WE HIT WAKE TURB EVERY DAY BECAUSE OF THIS. WE ALWAYS EXPECT IT BTWN VTU AND SMO. THEN OVER SMO; ON DOWNWIND AND UNTIL WE LAND. THE MAIN REASON FOR THIS IS BECAUSE; AT ANY GIVEN POINT ALONG THE RTE; THE PREVIOUS ACFT WAS ABOVE WHERE WE WERE AND DSNDING. EVENTUALLY WE END UP IN THEIR WAKE. THIS AFFECTS THE CREW AND PAX AND SOMETHING NEEDS TO BE DONE. SOLUTION: BRING THE SMALLER ACFT IN ABOVE THE LARGER ACFT'S FLT PATH. THIS IS A SAFETY ISSUE AND IT NEEDS TO BE ADDRESSED