I think in America's case the politicians feel that the existing equipment, if continually updated, is enough to handle just about any foe. Realistically, that's pretty much the truth. Research and development continues, so that when the wonder weapons are needed the designs are ready to go. The expertise is certainly there, and it's just a matter of getting production under way.
Canada doesn't have that luxury. We've long since lost much of our design and production expertise because of government short-sightedness and general ineptitude! Any expertise we do produce usually ends up south of the border, where the demand is. Not to mention the pay!
