Feel free to read into my words whatever you want but don't make it sound like that is what I wrote it makes any kind of discussion impossible.
The world is a lot more complex and involved than you make it seem, the west does have a debt and I highly doubt it even can be repaid, especially because we're still raping and plundering the African continent as we speak.
That dead white guy you're referring to was actually on to something, he just missed on important little detail: the amount of greed and the willingness to commit crimes that is present in the people that he thought would be happy to make the world work in a better way. The fault lies not with Marx but mostly with those that co-opted his ideas in name only to use as a fig leaf to further rob the general population. Note how every communist country was very keen to adopt the stance that they were owned by 'the people'.
Sure China is happy to sell us chips (and Korea as well) but the only reason that trick still works is because of environmental impact denial and low wages make it competitive to do so. That won't last for ever.
China is economically powerful, but morally bankrupt in many ways. India has similar problems, Africa is going from bad to worse reducing its un-replenishable stock of precious resources at bargain basement prices in deals that benefit no locals other than a very select few. With the loot safely stashed in Swiss bank accounts.
Whatever happened in the dark ages is none of my concern, right now a great many fortunes can still be traced directly back to crimes in the past or crimes ongoing today. And that is a debt that is on the books, not lost in the mist of times.
I completely agree that China and India are where the next huge improvements will probably be made. One of the reason the WIPO is so strong in favor of nailing down IP rights globally is to make sure that the west will get its cut, even if it doesn't actually produce anything anymore. Just another chapter in that book.