First off, I don't know shit about how banks work anywhere...so don't criticize me about that. 
I was just talking to my friend over MSN, who happens to be Australian, and he was explaining to me that his bank gives 2% interest for the amount of money he has in his account. 
Once he told me that I started to say how if I were to take the $2,000 I just made over the summer over to his bank in Australia and deposit it that I would gain more than double in a year. 
Initial Deposit = $2,000 
+ 
A year's interest = over $2,080 
= 
Over $4,080 
Then if I were to come back the next year when my account gained the $2,080 I would have another $2,000 to deposit into the bank which would total to roughly $6,080.  Then the next year I would have roughly $12,403.2.  I just don't see how this would work out.  Then again...he could have been joking with me...