HM is purely technocratic and MFFS is democratic. Macroeconomists that subscribe to this POV hold the conservative position that that democracy cannot be trusted with the purse, so a technocratic solution that is independent of democratic control or influence is required in the case of HM.
This implies that a macroeconomist cannot be an actual liberal but only a faux liberal after the manner of Blair's Labour that triangulated with respect to Thatcher's Tories and became Tory-lite, just as did Bill Clinton in adopting Rubinomics.
Helicopter Money: missing the point
Simon Wren-Lewis | Professor of Economics, Oxford University