But not of the sort you'd get at GMU:
"The question to what extent these state influences, public debt, taxes etc., grow out of the bourgeois relations themselves -- and hence, e.g. in England, in no way appear as results of feudalism, but rather as results of its dissolution and defeat, and in North America itself the power of the central government grows with the centralization of capital -- is one which Carey naturally does not raise." - The Grundrisse, Notebook VII
There are very real questions about the robustness of libertarianism that public choice theorists do not concern themselves with sufficiently. This is what Marx is getting at here. There are also applications of public choice theory to austerity that are not being probed.
If these sorts of things aren't addressed, public choice theory is going to be more of an ideological backwater than a scientific enterprise. These questions matter a great deal, and they'll be taken up by people who label their work "political economy" or "institutional economics" if the people who label their work "public choice" ignore them.