i may be mistaken but was Hitler not quoted as sayingThe truth of WW2 is the RN did just that. It was the RN that prevent invasion in 1940 (not the RAF) and kept the sea lanes open in the Atlantic, evacuated the Army from the beaches (Norway, Dunkirk, Greece, Crete, Dieppe...). And when it was not there for lack of carrier power disaster followed (Singapore). But these are not seen by the public and this does have an effect on funding.
not to mention 50%+ of the convoy escorts to Britain in the early war were Canadian not RN.We cannot invade Britain until we have air superiority.
All branches of the Armed Forces have their roles, i look at it like this for both Australia and the UK (Being Islands)
Air Force - defensive
Army - Offensive
Navy - Offensive/Defensive