Cana-nomics

Every red-blooded American knows the rule of Starbucks tipping: When you get your change, you just dump the coin part (aka "the worthless bit") into the tip jar, and at your discretion (i.e. hot barissta) add a $1 bill.

But no matter how many times you've been to Canada, you'll fall for this scheme at least once: Buy a $2 coffee; get back $3 in "change" due to lack of bills smaller than $5; follow Starbucks rule and absent-mindedly dump all $3 into the tip jar.

This is the only reason Canada even allows Starbucks in the country, and is now the cornerstone of the entire Canadian economic system. The $3 of pure profit goes not to Starbucks but straight into a Canadian's pocket, which he then spends on Canadian needs such as back bacon, Rush albums, and soft-wood lumber.