I do not know the original source for the claim that Mill was the  
source for Hayek's view.  Hayek definitely had very mixed views  
about Mill, for unsurprising reasons.  One sign of his respect is  
that when he married his second wife, they followed for their  
honeymoon exactly one century later to the day, day by day,  
the path that Mill and Harriett took in Greece and Turkey.  This  
is from Bruce Caldwell.  
  
Barkley Rosser