I would suggest that less than 10% of MP's have any real conception of what the Armed Forces actually do. Any member of the "Great British Public" born after 1940 would only know if they had actually served.
The Cadet Corps such as the ATC are a fraction of the size they were when I was a 14 year old - and almost all the School Units have disappeared.
Rudyard Kipling put it far better than I can:-
"Its Tommy this and Tommy that and "Chuck him out the Brute" - but its "Saviour of his Country" when the guns begin to shoot".
The trouble is that it will be too late to rectify the deficiences once the shooting has started.