Again, the above poster seems to have missed the point.
If we need to get somewhere quickly, in a strategic role, then we either augment the crew to give us a 24hr crew duty period or we use a slip pattern with pre-positioned crews. The current airbridge goes from the UK to theatre and back in 18-20 hours (when 's')
The one crew/one airframe ratio is for
tactical in-theatre/intra-theatre tasking.
Operational constraints and other factors lend themselves to this manning arrangement and it works!
Also the RAF's C130 fleet currently contributes 75% of the ISAF in-theatre military airlift, operating round the clock when tasked.
Not bad for one crew per aircraft.
What we actually need now is more aircraft to ease the burden.