Varieties of criticism
Conservative criticism has nothing much to do with "left-wing" or "right-wing", because left-wing people are often very conservative, in the defined sense, while right-wing people can also be very radical, in the defined sense. The difference between "radical" and "conservative" has more to do with the belief in whether "a change to something genuinely new" is really possible and necessary. Radicals typically believe strongly that such change is highly desirable and necessary, and that it can be achieved. Their criticism is that there is "not enough" change. Conservative critics, by contrast, are very skeptical about any such change, because they feel the change is really "just another form" of something that already exists.
Vast right-wing conspiracy
After the release of a deposition Bill Clinton had given to the Independent Counsel in which he perjured himself, some conservatives began to adopt the VRWC phrasing ironically. In 2004, conservative lawyer Mark W. Smith wrote the "New York Times" Best Seller "Official Handbook of the Vast Right-Wing Conspiracy", which came with a "membership card" that made its owner an "official member of the VRWC." Similarly, a number of newspaper, magazine, and website articles have used the phrase to report on left-wing politics. Eugene Volokh's blog The Volokh Conspiracy is said to have derived its name from as a reference to the "Vast right-wing conspiracy" statement.