[For the last month, I've been serializing my 2003 Harvard Law Review article, The Mechanisms of the Slippery Slope, and I'm finishing it up this week.]
As with other slippery slopes, the danger of a political momentum slippery slope creates a social inefficiency: the socially optimal outcome might be A, but it might be unattainable because some people who support A in principle might oppose it for fear that it will lead, through political momentum, to B.
