I read that one before, but magomago beats me to the punch....

I am still digesting it, but no doubt it is COMPLETELY logical.
It is very simple. Forget about research, population, who writes the cheques, etc and focus ONLY on the commercial balance. There are 2 cases, positive and negative flow (superavit vs deficit). Also, consider the relative streght of your own currency. Given these conditions, you have 4 possible scenarios.
1) Your currency is stronger and your balance is positive: (Non existant right now, but it means you own the world. The EU would be the closest one)
2) Your currency is stronger and your balance is negative (This means that you buy more than you sell (USA), but because your currency is stronger it means you can afford more witht the same amount of currency)
3) Your currency is weak, but your balance is positive (This means you sell more than you buy (Mexico), but despite the fact that your currency is weak you make more money because the "trade currency" used yields more of your own currency. It basically means you got free money)
4) Your currency is weak and your balance is negative (This spells disaster, and it is the case is several countries of sister LatinAmerica. You buy more that you sell, but because you do it in a foreign currency that is stronger that your own, you keep falling further in debt because of the exchange rate.)
Now, if you take the world's largest importer (USA) with a strong dollar, it means that more goods can be bought with the SAME amount of dollars. However, if the dollar slides, it means that in order to buy the SAME amount of goods, you need to put more money.... Are you following it???
More money for the SAME amount of goods is called INFLATION.
Now, you basically got yourself further in debt, and if the currency used is stronger, you keep getting further and further in debt. That means, that to get the same amount of goods, you need to work harder....
The rest is simple to explain....
Alex
