I'd have to agree that the vast majority of the world's population are slaves. It is just a kinder and gentler form then the previous versions. In fact, Western society slaves are over all happy and content. Which is why they should be left alone and not bothered with libertarianism.
Which person would you like to be?
A. Happy to go about life consuming things like TVs, fancy cars, sports and McMansions while blissfully unaware or unconcerned the government is holding the chains of captivity that are wrapped around your neck.
B. A pissed off libertarian that knows full well the weight of those chains while also completely aware there ain't shit you can do about it.
I say leave 'em alone. We all can be pissed enough for 'em. No need to ruin their day.