The trouble with the idea of "self ownership" is that it sets a precedent for the self as ownable. Particularly, if property rights include the right of transfer, and self ownership is the foundation on which property rights are built, the implications are staggering.
At the risk of being labeled a mystic, or worse, a religious person, I hold that personhood transcends commerce.
To quote (pdf) Republican State House candidate Marc Goodson:
What is the inherent value of a man? What should be the limit of public subsidy for each? According to Democrats, there is no limit, our inherent value is priceless. This belief is anti-social, inhumane, and unjust; we are not priceless.
The candor is certainly refreshing. It's always interesting when conservatism reveals its true colors. At least free market advocates, unlike "free market" advocates such as Goodson, understand that the path to a subsidy-free society must start by kicking away the supports at or near the top of the food chain, not the kick-em-when-they're-down variety of self-righteousness to which some are apparently addicted.