Much has been said in this thread in regard to the Thatcher government "abolishing" the power of the trade unions and that is an established fact. Without doubt the foregoing stabilised Britain in the years throughout the 1980s, but in recent years those same legal restrictions have impacted on middle Britain in a way the conservatives who brought those Parliamentary bills into being could never have imagined.
Over the years the power of employers has increased due to a number of factors. However, within that the ability of employees to organise to maintain their wages and standards (with the exception of workplace safety) has declined.
The foregoing has impacted on "young middle Britain" more than any other group. Those persons no longer are able to get on the housing ladder, achieve reasonable salary increases, find affordable child care as both parents have to work longer hours to make financial ends meet.
In that, those "young middle Britain's" would have voted conservative in the 80s and early 90s, but the above factors now mean they are increasingly rejecting established thinking and seeking alternatives, hence the rise of Momentum and through that the Jeremy Corbyn wing and leadership of the Labour party.
As I stated earlier in this thread, to be a Conservative you need to have something to conserve. If you cannot get on the housing ladder or achieve a reasonable salary increase to maintain your family's living standard you will in increasing numbers not look too "the establishment" for the answer to your problems.