Your debate team could explore the role of government approach:
For me, the question of government's role in investing and providing mental health services comes down to a question of federalism. The Bill of Rights originally set out to define and protect citizen's rights as well as states' rights; the Tenth Amendment provides that "[t]he powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people." Ideally, states should have the power to enact laws and programs regarding the health of their citizens; of course, in the last fifty years, the national government's role in healthcare has expanded exponentially.
Should the U.S. invest more in mental health services? From a need-based perspective, the country probably should invest; mental health care is a genuine need for many people in this country. From a Constitutional, strictly political point of view, however, mental health services is really not provided for, leaving the topic to fall under the category of powers given to the state mentioned in the Tenth Amendment.