I think if a culture finds out that doing a particular thing benefits it greatly, and that it cannot be punished for doing that thing... it will do that thing.

This idea of "cultural differences in the idea of stealing" is a bit silly. It's based on self-reports of the people who are stealing, and making massive amounts of money from the theft. Rationalizations, in other words.

In all honesty, if I could "steal" from a culture with a far superior level of technology without repercussion, in order to sell products mainly within my own culture, I'd do it too. It's still a benefit to the whole group, isn't it? The same story plays out every time this power dynamic comes up, and in far more varied patterns than people talk about (e.g. Japan "stealing" transistor designs to start its electronics giants, with the cooperation of a few Americans but still against moral values).