Answer:
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.
Round like a dishpan and smaller than a bathtub. But the ocean can't fill it. What is it?
Jack and Jill when up the hill jack fell down
I fly through the air on small feathered wings, seeking out life and destroying all things.
Give it food and it will live, give it water and it will die.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.