I am under the understanding that the largest wealth transfer the world has ever seen was the various flavours of colonialism that have been practiced over the past few centuries. We are the beneficiaries of this sort of thing, and yet, we have forgotten all about it...
Incidentally, would you consider someone getting paid 1/10th what an American worker would need to get paid, to make a widget, to be wealth transfer? In which direction? To me, it seems to be a wealth transfer from the person employed in the sweatshop, to the west. [1] We have been enjoying the benefits of this sort of wealth transfer for the past four decades. I must say, hundreds of millions of people giving you their labour for next to nothing, for decades, dwarfs whatever impact IP has in, ah, transferring wealth.
[1] For some odd reason, a large number of modern politicians think that it is a wealth transfer in the other direction. I'm not sure they understand, or appreciate the fact that people on the other side of the world are willing to work for us, nearly for free.
Edit: Cleaned up the language.