I see some fundamental differences in the points of view here.
You see,
we make friends and trade partners. We do not alienate ourselves from them and the rest of the world
We do not fear the ones we trade with, we treat them with respect and don't become paranoid. Life is a give and take and so are the relationships between countries. The countries we trade with, have as much interest in dealing with us, as we have in dealing with them. Any kind of aggressive act would hurt both sides. That is called "balance of trade". Ours is even, how about yours?
Oh, I forgot, you trade by making debts for buying foreign goods. Well, talking about becoming someone's slave
We might have our faults but we do not bury ourselves in foreign debt, so we can uphold our bloated standard of living. That you have in common with Greece, btw.: The people in both Greece and the USA are wealthier than they actually deserve, based on the real economical power
We might need to import resources, yes, but at least we're not the Chinese's lapdog, when it comes to financing our lifestyle
So when do you start?
I agree, that we have to find another solution for the "problem countries". But for that they have to become reliable first. The trouble they're in, is not a natural law or something or a geographical disadvantage.
Greece is not doomed to stay poor forever. What they need, is to gain back trust. Trust in their politics, trust in their ability to be reliable partners. There have to be lots of internal reforms to create good conditions for foreign investors.
When that happaned, investors will come. I mean, come on: The weather is fine, the landscape nice and you have the Mediterranean at your doorstep
It's only a matter of giving the right incentives.