In fairness (in the UK at least) the decoupling of unemployment and inflation occurred in the 1970s well before minimising unemployment rates ceased to become an objective of government policy at the end of that decade. Exogenous shocks like oil prices and trend decline in the competitiveness of (UK) manufacturing helped drive this.
Thatcher's shock doctrine may have had many flaws of its own but the abandonment of targeting unemployment via monetary policy was preceded by the previous administrations' failures to actually achieve their unemployment objectives.
Thatcher's shock doctrine may have had many flaws of its own but the abandonment of targeting unemployment via monetary policy was preceded by the previous administrations' failures to actually achieve their unemployment objectives.