You got that perfectly wrong. Libertarians will give the married homosexuals tax and economic benefits they don’t deserve. Costing the rest of society. While misidentifying who we are as a people to future generations.
A libertarian would not give ANYONE tax benefits. A libertarian would eliminate the whole question by eliminating the income tax.
After what I've read, there are 2 types of libertarians. Social liberals who just don't want to pay for the clean up after the party themselves, and true libertarians. The true libertarians wouldn't have a "special" tax for any reason. Everyone would pay a small amount to keep the military and highways working, but that's it. The feds power would be strictly limited to what's written in the Constitution and nothing more.