I find it really entertaining that the people who claim that libertarians are ideologies whose points might make sense in theory, but don't pan out as planned in real life, are the same people who imply or outright state that the introduction of libertarian ideas into politics is a fast track to Somalia and slavery.
The most obvious problem with this argument is that there isn't any evidence to back it up. Libertarians make certain claims about minimum wage hurting poor people and stuff like that (and by the way, that's a really, really low-hanging fruit--most libertarians focus most of their attention on ending the drug war, military adventurism, and civil liberties/privacy) and immediately people claim that this will clearly lead to effective slavery, but their arguments are no more coherent.
The other issue is that we need not take a black and white view on libertarian policies in general. It's not like having a libertarian President, for example, will result in the end of the minimum wage, although it will lead to far less militarism and far fewer civil rights abuses. And let us suppose we have enough libertarian Congressmen to end federal minimum wage. The states are still free to have minimum wage if the way, and if the states that don't have minimum wage see bad results, there is a very strong chance that they will correct themselves and re-institute the minimum wage.
There's also the more general point that it's far from clear that having powerful, centralized government results in less slavery and violent death. Everyone knows that the Civil War was fought by a government in order to preserve the "right" to keep slaves. There's also the sickening abuses perpetrated by the victor of the Civil War, including the waging of "total warfare" on non-military installations. And then, in WWI, the US managed to enter one of the most useless and pointless wars in recent history. WWII was a little more justified, but we nuked a country to end it and the acts that we engaged in in the European theater would likely be called genocide today. And then there's the rampant spying, the assassination of people with drone strikes (without any legal or judicial process, of course) and more that go on today.
Honestly, do you really think a libertarian society will be overall much worse than that?