With the notable exception of civil servants, the majority of Canadians do not have an adequate pension plan and are financially unable to establish one so they rely upon the sale of their property to simply exist for the last 20 years (give or take) of their lives. Or perhaps as Halifax Tar suggests passing it on down to family so they have a chance of an home apart from a council flat whilst living in the basement. Leave the family home alone or at the very least set the windfall tax as you put it at an amount that allows a retired couple/individual to move into something other than a social services residence. Current costs of a decent home are in the neighbourhood of 40,000 a year so given that 20 year span that would be a minimum of 800,000.