Shucks man...... if we do get ourselves an aircraft carrier, it's going to costs a bomb. In fact, bombs are much cheaper than carriers.

What's more, carriers do not operate on their own. I'm sure this has been said before already..... You need all sorts of other support ships. Destroyers, cruisers, minesweepers.... you name it. I think half of the RSN flett would have to be deployed just for one carrier group.
Even assuming that we have the money and the ships, do we even have enough manpower? The manpower required for a single carrier isn't the same as that required for a missle gunboat. It would take thousands of people just to man a single carrier..... not to mention the number of pilots we would need.
Anyway, if and when we do go to war it'll be regional. We will never go to war with China or India, simply because we don't have the resources to do so. Our aircraft flying out of our airbases can reach the surrounding countries within minutes of taking off.