Hey! If my answer doesn't fit your needs, I apologize; this idea is very broad, so the expected answer may vary depending on your class/the text you're reading, etc.
Just going off logic:
Art is a skill commonly linked to creativity/creative thinking/efficient decision making; adding it to elementary/pre school curriculums may be a way to help build those skills early-on.
It can also be argued, on the other end, that art is already very prevalent in early education (and investing more money and time into more complex art curriculums would be a waste).
These are very broad, general viewpoints; make sure you're linking them to the similar perspectives of credible people.
Gatsby throws parties and becomes rich so he can impress daisy and hopefully win her back to his side. This supports the theme called the American Dream. The American Dream is when the people tries to get everything they possibly can.