I think it's more of a case of:
Leupold has taken the time and expense to get the correct permits etc to export their product from the US, meeting all the ITAR regulations etc.
They chose Korth, for whatever reason, to be their importer/distributor in Canada.
They are "punishing" owners who have bought their scopes through the "grey market", most probably at a lower price because they didn't pay for the correct export permits etc.
And yes, having to go through a single source importer/distributor does help jack up the price further.
I deal with Korth and you have the "list price" in US dollars, which "no doubt" has Korth's mark-up included. And while I don't know what that is, somewhere between 10 and 20% is probably "in the ballpark" (to pay the import fees, shipping to them etc - should be no duties due to NAFTA and "their cut"). Then there is the "currency surcharge" to convert the US price to Canuck bucks.
Then their is the shipping to the seller and the retail mark-up.
Leupold just want's to make sure that 1) their scopes were "legally" imported and 2) that everyone in the "food chain" got paid.
There is not a great deal of profit to be made at the store level on Leupold scopes - because of cost by the time it gets to the store if they were marked up at the same percentage as just about every other brand, nobody would buy them.
So it really sounds like Leupold is protecting the market by not letting "Bob" smuggle in a couple of cases of scopes from the US and drive the price down to the point where the "legal sellers" can not afford to sell the product.
And obviously Bass Pro and Cabela's is not sourcing from Korth but instead just "sending them up" with the rest of the crap they send up to the Canadian stores. And because of that Leupold is making BP/Cabela's deal with any warranty liability since they must be pocketing significantly more from the sale of a Leupold than any "legal" Canadian retailer can.
There is a number of Leupold models that I can't even carry because my "cost" would be within 10 bucks of what Cabela's is selling them for.
So by bypassing the "program" the result is "less retailers" carrying the product which is never good for the consumer in the end.