That’s not ancap libertarianism nor effectively even mundane libertarianism, ultimately. In a practical sense that libertarianism is only opposed to strictly chattel slavery (at best! Get many libertarians behind closed doors they may not even go that far!), not things like debt slavery, wage slavery, company scrip, etc.

Because they ultimately don’t generally care about market freedom, they want the unrestricted power to be feudal lords of their polities.