They aren't indentured to another person, they're indentured to the laws of nature - needing to eat, find shelter, etc. When in human history has this not been the case?
Where are you living that you are getting free food and housing? Everyone I know is obligated to pay someone for those things. In that way people are "indentured" to those who can provide those things, as there is no reasonable way to procure them without money, which can only be earned by submitting oneself to another's will.
