What is the point in having a few items of EFFICENT equipment if there are not enough of them to do the job.
That sort of attitude in 1940 would have meant that if Fighter Command only had 1 squadron of Spitfires it would have been OK because it was a first rate fighter and it was easier to shift 1 squadron around the UK rather than a Group .
Fortunately we had more than 1 squadron of Spits and a lot of Hurricanes too otherwise they would have been swamped on the first day! And we would all be speaking German!