I'm not sure if the Tsars ever saw booze as purposely as way of social control. Certainly, vodka had become part of the Russian mythos, and the government monopoly began in the 1470s. High vodka prices also occurred during time of political trouble, such as the Time of Troubles. The social control was perhaps a benefit, but with a myriad of issues; during the Russo-Japanese war, recruits would also often show up to recruitment stations drunk and riotous. Alcohol also effected the cohesion of the Russian army in Mukden. Japanese soldiers reported seeing Russian troops so stone cold drunk that they were able to bayonet and kill them without any issue.
I believe the Russian government promoted vodka heavily in the 1860s, but they also repealed government control of the distilleries in 1863, causing prices to plummet and making it more readily available. The end of serfdom also meant an end to estate distilleries, where aristocrats had been allowed by Catherine the Great to make the stuff on their own estates... often of dubious quality. Taxes on alcohol provided the Tsarist regime with 40% of it's total revenue at times, which was needed during for military expenses and also their modernization and reform efforts. Certainly more issues arose from the heavy consumption of alcohol (seen in Soviet times especially, with most crime, domestic violence and hooliganism tied to alcohol consumption, not to mention the heavy effect that drinking had on production in the economic sector).
Alcohol also perhaps played a role in both the collapse of the Russian Empire and the USSR. Nicholas II introduced prohibition so that grain could be conserved for food, which introduced a myriad of issues, the most important being depriving the empire of much needed money when it was mobilizing for war against Germany and Austria-Hungary. Gorbachev tried the same thing, with disastrous results; all he did was make it more expensive and time consuming to drink. Russians started making their own homemade hooch, which meant sugar and all sorts of other items needed for homemade distilling flew off the shelves... making the food supply within the late USSR even more problematic.