One counter-argument is that by freeing up people to pursue their interests, there will be more good businesses opened as well, which will be profitable in the long run. The other is that a person would not pursue a project that is not well-received for a long period of time due to negative feedback.
Neither of these fully answers the problem though of what the system would do to stop people falling off the economic grid and the impact on GDP/taxable income this would have. Any thoughts?