NWMP really formed to protect the interests of the eastern elite.

"A number of officers of the force came from elite Eastern Canadian backgrounds....... As representatives of the upper strata of Canadian Society, they brought with them fixed ideas of proper cultural and social norms. These ideas influenced not only their social expectations but also their perceptions of crime. Since their predominant duty was to maintain order on the frontier, the police had to differentiate between crimes that were merely a nuisance, and those that were a threat to social stability. The distinctions they made were often based on assumptions about the socia order, in which less was expected of the "lower classes."
"The police were closely linked to another elite group, the cattlemen. ........the police and ranchers were tied to a mutual interest in the cattle business. Protecting ranchers against cattle theft..and related stock crimes was one of their primary duties. .....Close personal relationships developed between the police and ranchers through frequent contact.........
"Finally many members of the force saw the economic opportunities ranching afforded, and became ranchers themselves once they completed their terms of duty."
http://ucalgary.ca/applied_history/tutor/calgary/nwmp.html

(Some of the mounted police combined their duty with building up their ranch at the same time. Some were English; a son of Charles Dickens was a member for a time.)
The whiskey traders were put out of business, but the liquor trade was taken over unhindered by the "lower classes" in the developing towns.