I contract away time-slices of my human effort. I consider that I own that effort by right, and part of that ownership bundle is the right to destroy or exchan

I contract away time-slices of my human effort. I consider that I own that effort by right, and part of that ownership bundle is the right to destroy or exchange it. So it is consistent to both have a right and to trade parts of it away. It would be less of a right if I were prohibited from exchanging it for other priorities, like food.