A couple anarcho-capitalists recently posted this in-depth critique of pragmatarianism....Pragmatarianism Disproved. Here's my response...Pragmatarianism Disproved?
To try and summarize...they used a pragmatarian system with a 100% tax rate as their example and my rebuttal was to challenge them to explain how allowing millions and millions of utility maximizing taxpayers to directly allocate their taxes would result in a 100% tax rate. Not that there would be anything wrong with a 100% tax rate in a pragmatarian system.
Pragmatarianism = choose where your taxes go!