One of the dumbest statements repeated and written on jigging the canal is "If your not losing jigs your not fishing correctly" When you get it all figured out you may occasionally loose a jig here and there, it cant be helped. But you should not be loosing a ton of gear.
Doc Most likely most of your problem stems from line control. One of the most important things with jig fishing is staying in constant contact with your jig. This can be difficult to do if using spinning gear. At least in my opinion. This can be easily seen and learned by watching other fishermen. When you see someone jigging hard watch the line on there rod. most often you will see the line go slack as they lower the tip waiting on the tide to pull the jig tight again. This is the time when you have no feeling of whats going on at the bottom and a snag can happen before you lift the jig. On the opposite side to that if you take a look at someone that knows what there doing with a conventional set up you would probably notice less jigging motion and a constant tension on the tip. As for me. I don't fish heavy, I fish just enough weight that will allow the tide to lift the jig when I hold tension and then I drop back in free spool to tap the bottom and to tight to lift. And no, you don't need a ton of back breaking rods to jig with. Something moderate, with a firm tip and parabolic action works great.