You know, I'm not promoting or condoning anything here, I'm just looking at things from an idealised ethical perspective, which doesn't have anything to do with current laws or societal norms. I like to think beyond those.
No, relative wealth of either shouldn't come into play at all in regard to whether you should or should not steal music or movies. If you don't have the money, you can't afford it. Wait until you have the money. Save your money and purchase it when you can afford it. This is simple economics. You get what you want, the author gets paid to continue making creative works, publishers and manufacturers of the product get to be compensated for the time and material. Everybody wins.
That not really how I presented it. The assumption was that person was never going to buy it, like the hypothetical alien wasn't.
Barter and trade being basic concepts in society was where something tangible was given up, or a person's time. Objects that were finite and required effort. That was the consumer value -- maybe not a legal construct at that time, but part of a social agreement none the less.
Stuff that can be copied just is different, since it isn't tangible and the commodity mountain doesn't shrink as it's taken from. And as such, the items forming that mountain have no tangible value.
When a person can create an infinite commodity mountain, the payment should rightfully be for their effort in creating it. But that effort is singular and finite -- it isn't duplicated with each copy of the product.
A person like our hypothetical alien who nobody knows about, doesn't affect the creator by taking from that mountain.
The way I feel that relative wealth comes into play is only in the scenario I described regarding the unknown alien user. It seems unfair for a (singular) effort to not be rewarded in any way by anyone. But if an unknown alien has benefited from the creation, then if wealth is there to give a reward from, and it would seem ethical to make that reward.
Current society isn't built on this kind of thinking though.