Does it have to grow bigger or downsize to accomplish its mission?

Since the attacks of 9/11, billions of dollars and countless resources have been committed and expended in the attempt to make the nation more secure. Homeland security is a massive enterprise that gets larger by the moment. What was once mostly a TSA/aviation concern has evolved into a multidimensional operation covering a broad array of disciplines. These include critical infrastructure protection, border security, transportation security, intelligence and counterterrorism, emergency management, immigration and naturalization, and public health.

Does it have to grow bigger or downsize to accomplish its mission? Support your position or opinion with what authorites say about the size of homeland security and its ability to accomplish its mission