#3a Whose time is it anyway?

This is a PS to my previous post

In a discussion with a journalist today, we got talking about the way we talk about time.  

We say "free time", "spare time" and "time off" to define time outside of work. 

Why do we define our paid working hours as the benchmark for measuring time? I think that's strange. Even the word "leisure" has its roots in the phrase "to be allowed or permitted". Wow.

One of Webster's definitions of leisure is "time when you are not working : time when you can do whatever you want to do" - which sort of assumes you never want to work.

This is also a reason I've never understood the phrase "work-life balance". Why would you see your work as not part of your life?