The rot set in with Sir Alex Douglas-Home .... solid PM who was respected and effective in negotiating the Cuban Missile Crisis and getting the Conservatives from wipe-out to only losing to Wilson's labour by 4 seats in less than a year .... not good on the TV and his 'chinless-wonder' looks fed the media .... since then 'looking good for the lens' has become essential and 'solid, honest and competent' has slipped down the requirements of the politician's job-description.
Hence we have 'rule by used-car salesman'. ! *
K
* apologies to used-car salesmen