Vacations and the 8 hour workday is a great achievement of a human society. It might not be seen as something revolutionary, but it is. It is a gentlemen’s agreement. Despite some of us being able to work more, at least sometimes, during some periods of our life, we collectively agree that we will not. This is not because we are lazy. But because we want to protect those who cannot afford to work more. 8 hours is an arbitrary decision (we could work less), but it is an important one.