We're not saying they're the laziest -- it could be that they're the most efficient. Whatever the case, if you live in Belgium, you'll work fewer hours on average than if you lived anywhere else in the world. The Belgians work about seven hours per day, while the Mexicans, who work the most, average 10 hours per day.
As a matter of fact, Northern European countries make up seven of the 10 countries where workers are on the job for the shortest amount of time each day. Denmark, Germany, Netherlands, Finland, Norway and the United Kingdom are also on that "bottom 10" list. South Africa is the only non-European on that list, while France and Italy are also on it.