"We can't" is, in many situations and certainly when it comes to international treaties, a polite way to say "we don't think it's worth the costs". Nobody can m

"We can't" is, in many situations and certainly when it comes to international treaties, a polite way to say "we don't think it's worth the costs". Nobody can make a country stay in a treaty if it doesn't want to, but it often doesn't make economic sense to blow up your international trade agreements over specific policies that you might prefer to be set differently.