| Individual tend to fill the time he·she set aside for.
Work expands as to amount of time available. Parkinson’s law is a principle that states that the time required to perform a task tends to extend to all the time available to perform it1. This means that if you give yourself more time than you need to complete a task, you will end up wasting that extra time and making the task more complex and stressful.
Relates to The Productivity Paradox