If we were to analyze the current system, how it developed, and realize it is unsustainable, it could happen. However, very few are looking at it that hard.
"Small(er) government', or policies aimed at reducing the size of government could be applied to many areas not directly related to the basic needs of citizens, such as public safety or public education (although both need reform). Government must always provided that which we have come to regard as core services - as the consistent delivery of these services can be used as a marker of general competence, or if incapable, a failed state.
Only the most hard-core libertarians would end the majority of government services, and it would be key to the loss of social cohesion and beginning of civil conflict in their utopia. Imo, most people who lean libertarian are not ideologues and recognize the benefit of government and social services, but want a smaller, more manageable entity.
I have no thoughts about whether the majority of Americans would be happy (
are we happy now?) with, for example, rolling back America's international presence or restructuring government services, but I am ready to enter into a national discussion and see if anything springs from it.