So, we shouldn't do business with folks of lower means, is that right? And to avoid doing so we should restrict ourselves to particular heterogeneous countries

So, we shouldn't do business with folks of lower means, is that right? And to avoid doing so we should restrict ourselves to particular heterogeneous countries, with geographic boundaries that aren't particularly effective at that goal. Spending money in places it is needed rather than already concentrated is morally defective because the spender might also benefit from the transaction? (Believe I read something similar once about folks trying to help the homeless. If the helper benefited one iota as well, the helper was branded a "monster.") I don't believe this is a healthy or valid take. We should all be helping each other, and a win/win situation is the best outcome imho. Because it incentivizes more.