Apparently they tried. One of the biggest match fixing allegations is going on in Europe right now (including Champions League games) and the CSL in Ontario is also been brought up.
Match fixing: Ante Sapina co-operating with authorities as the enormity of the operation hits home - Telegraph
At the other end of the scale the ring even thought it worthwhile to rig a match between two Canadian teams – Trois Rivierès and Toronto Croatia – sides whose existence was probably unknown to even the most obsessive football fan.
Match fixing: Ante Sapina co-operating with authorities as the enormity of the operation hits home - Telegraph