1. Almost all colonial powers in the west fought across the world primarily for territory, gold, resources, spices ...etc. This pursuit of selfish economic interests at the expense of rest of the world, environment is still we see in the world. Amount of loot/destruction from East to support Britain is just gigantic even during world wars.
2. Wealth, GDP might be there in the past Eastern world but that was by product/side effect of something else. No one really pushed for efficieny/productivity just like we see now in the west. It was individual interest to earn but not enforced one as if whole world is in a race and we will fall behind if we do not compete ...etc. You won't see such insecurity/paranoid in the past Eastern world. Selfish economic pursuit was never a primary/sole criterion for past India at state level. Yes, there were rules/laws for finances (e.g: Artha Sastra ...etc) but that is part of bigger picture just enough to maintain state but not main one. Kings of India before Mughals/British fought too among themselves but not for resources/money/territory. Dominating world/make a dent on the universe/earth ...etc was never part of eastern thinking even when East was financially strong. Concepts like Yoga/Kama Sutra ...etc emerged which are not at all connected to Finance/economy.
So do not look at just financial parts to understand whole. You will miss many subtle/nuanced/implicit points and your understanding may not be correct/complete.
Note: Please do not downvote if you disagree. There may be several implicit facts which you may not aware because of cultural difference.