Why? If the Free Market Fundamentalists are correct, the for-profit company should have it all over the tax-funded service, because the company would be interested in efficiency and technological advances and so on, as opposed to just being a... welfare... thing... like the US Post Office and everything else which, per dogma, Does Not Work.
> You can prevent rent-seeking by repealing any "sponsored" laws that protect their monopoly.
Like the property laws which prevent others from using the wires they pay to put in, or do you think three cable companies should mean three completely separate sets of coaxial cables running everywhere in town?