Original Version:
Some people are funny.
They spend money they don't have,
to buy things they don't need,
to impress people the don't like.
Alternative Version:
Some people are funny.
They spend money they don't have,
to buy things they don't need,
to impress people the don't know.
My Environmental Version:
Some people are funny.
They want people to spend money they don't have,
to buy things they don't want,
to impress people the don't know.
Other wordings might come to mind depending on the situation and/or requirements.