Such proposal doesn't need justification. You can merely disagree.

Anyhow. The justification is that it is an important part of a communications infrastructure.

Just like the government finances roads, etc.

Converted to dollars, the value is far greater than the cost of a single bomb dropped on strangers that aren't a threat to me, so I don't need to justify it until someone can justify to me the bombs, the oil and gas subsidies, the bailouts, the...

> Do you have any justification in mind for the “free service” being funded by tax payers? Why should it be free for the people who need it, and why should tax payers fund it?

Because the government should provide useful services. It should be funded by tax dollars because I'm tried of libertarians, and it's well-demonstrated that the free market has consumer hostile incentives that I'm sick of.