if you don't want to spend 11 minutes watching this, please just read my summary.
Short summary is that money is not a good motivation once a person is making enough money to live comfortably. After that, it's factors like autonomy, mastery, and purpose, if the work is more than just simple manual labor.
When people are given free time to autonomously create things, even if it's challenging for them, and if they have a sense of purpose while working, people tend to be more productive than if they were paid money to do so.
She's an empty bottle, a broken glass. She's beautiful but alone, without love she sing her own song. I could love her if I had a heart but I'm done with it. Just feeling dark. And this way we walk together in our own loneliness. I could love her but she's so cruel. She could fall in love with me but she knows it could not be true.