Bullshit. Milton Friedman, Thomas Sowell, and every "Austrian School" economist support "classic liberal values" which ironically, are directly opposite of those claimingto the political label of "Liberal". It is intellectually dishonest to pretend they are.
The honest breakdown of economic schools of thought can be best delineated between Keynes and Hayek, with Krugman solidly in the Keynes camp and Austrian/Chicago schools of economic thought
aligned with Hayek. Similarly, Austrian/Chicago economists align with free-markets & conservatism while Keynesians & Progressives/Liberals favor more government control.
Holding classical liberal values does not make one a political "Liberal" if that's what you are suggesting.