I will grant that her ideas are both interesting and entertaining, judging by the excerpt. She also has a refreshing style of harsh verbalization. However, practicality and internal logic leave something to be desired.
First off, charging Lyubanka and dismembering KGB personnel smacks too much of 1789, likely with similar short-term consequences - accelerated tribunals, public executions, witch hunts. Who would have administered that, under what authority, with what aims, and with what political support? Democracy? Freedom? Capitalism? Culturally, I don't see Russians giving popular support to "revolutionary terror" in the name of those things. A few crazies may have run rampant for a short time, while the majority would have hunkered down in their homes, just like they always have. Before long, "the liberators" would become the new tyrants, or would be replaced by tougher meaner personages willing to be such, just like Stalin and Dzerjinski pushed out the gentler folk. It is a natural selection mechanism that ensures that bloody revolutions always end up with the worst, most cunning, most ruthless tyrants on top.
The bottom line is, as always, cultural. Western democracies, such as they are, have their cultural routes in a strong and populous merchant bourgeois class, which wants and needs participation in government. That class is a natural counterweight to any individual or group of individuals that becomes too big for his shoes. It is a form of distributed feedback control, which provides stability and balance to government as well as forms its political basis. "Checks and balances" is just the legal manifestation of this cultural and economic imperative.
Russia never had that bourgeois class. Such started to form in late 1800s and if it were not for WW1, they could have become strong and wealthy enough to transform European Russia to something closely resembling Western Democracy. That chance was lost in early 1900s, first with WW1, and then especially after the February revolution, when the bourgeoisie had their chance but blew it, by inexperience and the weight of events. That is why Russia has always been in the hands of "strong men" and their cliques. Slaughtering KGB just makes the killers the new KGB. There is no strong middle class to prevent that.
So, if anything, the accumulation of wealth, albeit in the hands of former chekists, may actually put the country on the way to the production of such a middle class, with a lot of luck. At least, this path has some chance of success. Anything that Ms N. proposes ironically would only perpetuate the cycle.
On a related note, the truly troublesome development of late 1900s is the gradual death of the middle class in the West, which erodes the counterweight and guarantor of the democratic system. It is a sinister noncoincidence that here we feel increasingly disenfranchised as DC moves progressively further out of popular control and representation. While that is becoming the reality of DC politics, tyranny cannot yet officially emerge, because the populace still clings culturally to the democratic ideas. So, the elites are bankrupting the country and impoverishing the middle class. When the middle class seizes to exist economically, people's opinions will radicalize, move away from bourgeois values, and then you have the system primed for dictatorship. It happened in Italy and Germany between the two WWs. Why wouldn't it happen again?