Its a PLOT! A Federal-Provincial Commission should be convened with a priority need to dig in, get to the bottom of this and any underlying reasons responsible for escalating these property costs. Leave no stone unturned - might be speculators and or investors! 

More seriously - it is surprizing how much prices have escalated. 4 graves purchased for grandparents and an aunt in the 90's for several thousand dollars - I was recently informed by the cemetery that the 4th unused space currently has a value of close to $20,000.  It would not surprise me if there are a large number of plots out there that cannot be used because they belonged to deceased folks that did not leave the necessary disposition instructions for unoccupied spaces in the family plots in their wills! (burial plots are considered real property).