What something is worth to me has absolutely no bearing on what something is worth. Worth comes from utility.
We need a definition for worth, because I have never seen an economic (or philosophic) one yet. Let us define the worth of an item as the marginal value of that item, or the amount of money you would pay to have one more unit of it. Then yes, worth comes from utility.
Now let us discuss the definition of economic value: it is whatever the prospective buyer and seller agree upon. It is the intersection of the supply and demand curves. It is the point at which marginal cost equals marginal value, or where the minimum amount you would have to pay equals the maximum amount you would be willing to pay. As you can see, value comes partly from “worth”, and partly not.
If someone started burning twenty dollar bills on the street, you wouldn’t just shrug it off. Despite the fact that it’s not your money, you’d still feel like something of value was being destroyed.
No, I would not shrug it off, because the person is causing a miniscule amount of deflation on a government-regulated currency. Other than that, I would shrug it off, because a person is entitled to do whatever he wills with his property by definition. I am assuming, for the moment, that the bills don’t belong to no-one.
When Toyota builds a car, it’s worth $18,000. Someone drives it around for three years and sells it to me for $12,000. I drive it around for a while and sell it for $5000. Was the car worthless before I bought it? After? Absolutely not, despite the fact that I’m not getting any use out of it.
There is exclusive claim on the car; it is not worthless. The owner can sell it for whatever the market price (objective value) is. Value does not depend on who is taking utility, but on the fact that utility can be taken at all.
Similarly, if we assume that taxes are 100%, the product of my labor is worth whatever it’s worth to the government (which depends on the use they put it to), not zero. I certainly wouldn’t say that what I’d made was suddenly worthless.
You create something and somebody else steals it: the object still has value because it still has exclusive claim. You create something and everybody and nobody steals it: the object has no value because it has non-exclusive claim and non claim.
You’re talking a lot about claiming, though, and that seems fishy to me. As I said to someone else above, it’s incredibly easy (and incredibly worthless) to prove the existence of ownership when you assume that ownership exists; that seems to be what you’re doing when you talk about claims.
Value exists because people value; people only value because they have exclusive claim (ie, exclusive ability to arbitrary use and disposal). Value is wholly dependent on the existence of exclusive claim. If product has no value because there is no exclusive claim to it, then neither does what product is equal to, the sum of mind and reason. If exclusive claim does not exist, mind/reason has no value, and therefore is of no value. Mind/reason of no value is no different in functionality than no mind/reason to begin with. No mind/reason is how animals are different from people metaphysically speaking. People being on a higher order than animals requires objectively defined exclusive claim, ie the “right to property”.
I am not starting with the concept ownership and then proving it exists. First, I define what the concept ownership; and then I show why it is necessary in our conception of nature. On the other hand, you could have a different conception of nature in which ownership is unnecessary - in which case you would have to renounce mind/reason and reject the distinction between Homo sapiens (wise man) and the oak trees.