Natural rights should hold in simple and complex examples, without resorting to utilitarian arguments.
> The income you and I have today is inextricably tied to the system of government, taxation, and trade that we are in.
Yes, that is our current context.
> You can't talk about holding one fixed and changing the other in any meaningful way.
Yes, the world is complex. I simply wish to see one with more voluntary interaction and less coercion. Too few hold liberty as a political value, settling for lesser subjective things such as "fairness."