Why won't our supermarkets label GE or GMO foods?

Given the role that supermarkets in Canada play in the distribution of
our food it is high time that executives and those making the buying
decision play attention to what their actions mean in the long run - not
in the interest of short term profits but in the interest of society as
a whole.

Canada and the U.S. are currently the only two countries in the
developed world that refuse to impose mandatory labeling of GE food.
"Monsanto's excessive influence in Ottawa explains why the Harper
government and a majority of MPs voted against Bill C-517 last May 2008
that would have labeled GE foods and given Canadians the right to know
," said Tony Beck, steering committee member with the Society for a GE
Free B.C..

http://www.greenpeace.org/canada/en/press/press-releases/federal-elections-call-for-a