Max Sawicky wrote two pieces recently about the viability of a left strategy focused on opposing rent-seeking. The pieces conclude that this is not a viable strategy for many reasons, closing importantly on this note:

The liberaltarian view acknowledges market deficiencies of interest to progressives but applies questionable weights to them and neglects more potent remedies. The Left has better answers — most of which our evanescent libertarians would reject. Rather than indulge the back-sliding tendencies of Democrats, the more logical course is to pry liberals away from their anti-state nostrums and their faith in the chimera of virginal, competitive markets.

Naturally, I agree with Sawicky on these points. Though I would state the problem somewhat differently.