Once again it isn't the cost of sugar it's labor and all the costs associated with it, i.e., health insurance, pensions; liability insurance cost (tort reform needed), infrastructure cost involved with old plant sites. As far as Kraft is concerned I'm sure they got a sweetheart deal from the Province of Ontario.
Don't know if they did or not... they already had a plant there and simply relocated the "Life Saver" product line . Do you have some source that says they got some incentive, or are you just guessing?
And why do you think that saving 50% or sugar cost on a product made of 90% sugar was not the reason? Do you think there would be any auto manufacturing left in the US if steel here cost twice as much as anywhere else in the world? Why should candy be any different?