Do most office based western people work less hours than people in other countries or people who do general labour in their home country?

Research says the average office worker in America only does productive activities for 2 hours and 45 minutes a day when they are at their jobs. They spend the rest of their office day sitting in front of the computer and doing nothing. I used to be friends with a bank employee that would chat with me online for over 4 hours a day while at work, cause she had a lot of down time in between tasks where she had no productive activities assigned to her.

Do most office based western people work less hours than people in other countries or people who do general labour in their home country?
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