This is what I see in the poor people: when you know the time left to live in your life, you appreciate your time more and spend it wisely. And for the rich people: they spend their time however they want to.
In our real world we don't know how much time we have left, but we still act like we have plenty of time. The truth is, sometimes we don't! It could be that tomorrow our clock stops ticking and we have to leave this world. Or we got a disease that makes that we can't spend our time like we used to do.
The thing is: we don't have indefinite time, so use it wisely! Don’t waste it!