Article actually says 'should' not 'must.' This is the crucial bit
He said over the last 30 years the Army had halved in size, with a 28% reduction in the last 12 years, but added that despite challenges in recruitment applications to join the Army were at the highest level in six years.
Gen Sir Patrick has been a vocal critic of cuts to troop numbers and military spending and will be replaced as CGS in June by General Sir Roly Walker.
He has not been the only one to criticise cuts, with former CGS General Lord Dannatt saying the UK risked a repeat of the 1930s unless it invested more in its armed forces last week.
This is a soon to retire general threatening the govt that the armed forces are so small that in any coming conflict the govt will have no choice but to rely on civilians - in other word, it's a threat to get defence spending and investment increased by whoever's in power post election.