Why is the elastic clause of the Constitution—also called the necessary and proper clause—so important?

What will be an ideal response?

An ideal response will:
1, Define the elastic clause, a provision of the Constitution (Article I, Section 8) stating that Congress has the power to make all laws "necessary and proper" to implement any of the other powers mentioned in the section; it suggested that many congressional powers were implied rather than spelled out in detail.
2, Explain that this clause was included because although the framers of the Constitution did not want to give excessive power to the government, they also wanted to give it broad power and there was a risk of leaving something out.
3, Conclude that the elastic clause is so important because it greatly enhances the power of the national government.