“Hey Christopher, got a million dollar idea. Why don't we print our won money.”
“Very good Manuel, why not?”
“OK, we will print these hundred dollar bills.”
“But Manuel, these Aussie dollars are made of plastic. The cost of making a counterfeit note would be quite high and we would be left with very little profit”
“So what do we do?”
“I Know. Why don't we print US dollars?”
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On Mental Floss : Easy Money