the simplistic (a.k.a. retarded) battle cry of the libertarian/armchair-anarchist in here seems to be "kill the state", not "reduce the state to its optimal level".
Let me put it differently: I'd be more than happy to discuss in which areas, in which countries, for this and that reason, the state has taken over more control than it should have. I however laugh at the notion that a complete removal of the state would somehow lead to a guaranteed improvement of our current living conditions.
The crypto-anarchists might suggest that much of what is currently government might be replaced by mathematics.
To that end, it is less "kill the state" and more "obsolete the state".
To the extent that effort is successful, it may "reduce the state to its optimal level".