I don't really get your point here. Are you saying that the RAF, Army and Royal Navy would be better if they continued to use old, outdated and sometimes decrepit technology?
No they're saying that the loss of equipment without replacement is damaging the armed forces, not that they don't need new equipment (which they do). Take for instance in the period 2003-2009 we had a 41% reduction in Battle Tanks (560 to 328 ), a 39% reduction in helicopters (366 to 222), a reduction from 31 escourt ships (Destoryers and Frigates) to 24.