Mr. Arends makes a very strong argument. And really, if you need a shorthand way to understand this issue, all you need to know is that the Bush Administration stripped away the limits on one company's ownership of spectrum. Republicans talk a good game about the "free market", but it's internally inconsistent talk; you can't have a free market if the number of players in said market gets below a certain level. 4-5 i…
What's so bad about a monopoly in a free market? Doesn't that just create opportunity for some other carrier, perhaps a currently small regional company, to step up and fill that hole? If the pain is big enough, there will be competition. If we mandate competition, it's not a FREE market.
In addition to the other fine replies made, I want to highlight this to strongly disagree with it. In fact actually having a free market requires aggressively protecting it when a given market naturally coalesces into a monopoly or oligarchy. Trust-busting isn't an anti-free-market position, it's a pro-free-market position. The anti-free-market actions come from governments picking winners and enshrining monopolies/oligarchies through regulatory capture.
In particular, when advocates of other social organizations level this as a criticism of free market, my response is to point out that when you have lack of mandated competition with some form of government-selected winners, be it communism, socialism, or "crony capitalism", you don't have a free market at all and the criticism is more generally applicable to the social organization being argued for by the person raising this criticism.
In a free market, a new company always ought to be able to come along and completely destroy an existing company if they do a good enough job. If you don't have this, you don't have a free market.