Basecamp’s “Work Can Wait” Pledge – Why We’re Not Recommending It

Do you want people to overwork and burnout? Because 'maintaining an informal culture that imparts a strong sense of freedom. The leadership makes it clear that what matters most is how employees perform and not how long they work or when they come and go.' is how you get people to overwork and burnout.

Everyone - managers, coworkers and the individuals themselves need external structure that prevents them from assuming that everyone else expects overwork from them, and from unintentionally expecting it from others, and themselves. Leaving this to 'judgement' means that eventually, everyone will be overworking 'just this once'.