Why Restructure CFL Contracts?

Perry Lefko has a good piece on Sportsnet explaining why CFL teams frequently restructure contracts. Tax laws favouring bonus payments, broke players in the spring and potential injuries sums it up. The CFL's salary management system seems to be fairly solid now, so managing and manipulating these contracts are more important than ever. The article mentions Bruce, Porter and Glenn restructuring who are probably the team's top paid players. With the team's better performance the past two years, are things becoming more tight salary-wise?