They'll start losing faith.
What are the consequences, though? We talk about the laws that Canadians have to follow. You have to pay your taxes by a certain time. You have to remit a certain amount of tax to the government. If you don't, there are financial penalties, including having your wages garnished. If you drive faster than the speed limit, there are financial penalties. If you break other laws, there are a range of penalties.
If the judicial branch were to stop enforcing any of these laws, of course, it would erode the public's confidence in that branch. The same applies, I would imagine, to the executive.
Wouldn't you say that in the absence of penalties and in a consequence-free environment, the number of agencies and departments that continue to ignore the laws would only increase because it's a consequence-free environment?