The CBO tells us what we already knew:

I concluded the talk by emphasizing that fiscal policy is on an unsustainable path to an extent that cannot be solved by minor tinkering. The country faces a fundamental disconnect between the services the people expect the government to provide, particularly in the form of benefits for older Americans, and the tax revenues that people are willing to send to the government to finance those services. That fundamental disconnect will have to be addressed in some way if the budget is to be placed on a sustainable course.

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