That the maintenance of the rule of law requires One True Man to stand outside the law and protect us through extrajudicial killing and torture. It is a statement on the core concept of law and justice.
You seem to have some definition of politics that differs from the one I use. Politics is discourse and debate about the form of government and the exercise of power. As such, the political statement of "Reacher" or "24" is exactly what I described above: the implication that it is necessary to have someone who breaks all the laws, in order to maintain the system of laws.
Note that in the past we have had pop culture artifacts that argue the opposite, that stand for the triumph of the rule of law over individuals who arrogate extrajudicial powers to themselves. "A Few Good Men" was such a statement.