That actually illustrates my point. In 1985 you had 32000 soldiers and 6 infantry battalions. In 2014, we have 30000 soldiers and 8 infantry battalions (if you include 2 Cdo, which didn't exist in the 80s and is actually the largest unit in the army). In addition, today's army has three helicopter regiments, three fully manned armoured regiments, a special operations engineer regiment, an STA regiment and all sorts of other operational units that didn't exist in the 80s. So today's army has far more teeth to tail than the army of the past.
Where the army is hurting is CSS. We quite literally don't have enough CSS to support the combat units. We don't even have enough soldiers allocated to logistic units and echelons to man all the equipment. This is why bulk supply is being centralised in 17 CSS Bde, why health is brigaded into the CSSB, why clerks are brigaded into admin units etc etc. All terrible, horrible initiatives, but all designed to do more with less to support the F ech. Another infantry battalion will not help matters.
Using the size of the population to justify an increase in Army size isn't very helpful. The nation is big enough and rich enough to support the raising of a couple of armoured divisions. Doesn't mean it's a realistic option.
Far be it for me to defend nonsense WHS impacts, but not doing OCL is a very good thing. It's not a lack of seat belts that limits numbers in a Blackhawk, it's a lack of crash proof seating. Rip the seats out and you might be able to fit more soldiers in, but if the chopper crashes every single one of those soldiers will be dead or seriously injured. If you look at our experiences with helicopters on ops in the last 15 years, how many soldiers have died due to enemy fire? How many have died in helicopter crashes? The USA doesn't do OCL at all anymore. In fact, they are amazed that we still have it on our books as an option.
OCL has been relegated to a 'break glass in the event of war' capability. And, by war I mean the 3rd Shock Army advancing across the Fulda Gap, not Afghanistan/Iraq/East Timor.