What condition do these lines from a Rolling Stones popular song refer to?

"You can't always get what you want

You can't always get what you want

You can't always get what you want

But if you try sometimes well you might find

You get what you need"

The correct answer to this open question is the following.

The condition that these lines from a Rolling Stones popular song refer to is "scarcity."

This is the chorus of the world-famous song "You can't always get what you want," written by Keith Richards and Mick Jagger, guitar player and singer from the British rock band The Rolling Stones.

The condition is scarcity because when you can't always get what you want, it means that there is no abundance about the things you are looking for. So people have to conform and accept the idea that instead of what they want, oftentimes they might find that they get only what they need. Life is not always fair.