I'm as centrist Liberal as they come, but even I see the need for the sun to set on supply management. However, political expediency keeps this system alive and those calculations have not changed. There are many voters in rural Quebec and eastern Ontario and neither the Liberals or the Conservatives are truly brave (read: stupid) enough to rock that boat.  Maybe a successful WTO ruling or unyielding pressure from NAFTA negotations can break the logjam loose and the reigning government of the day can claim the devil made me do it. However, without that intense external force, keep paying too much for milk in plastic bags.