werent there discussions exactly like this while the F-111's budget escalated and the delivery dates receeded into the distance about 50yrs ago? 
Can your source that? I'm not being cheeky, just interested in the discussion. I do know that an F6FHellcat cost $150,000 in those days, which would run around $3 million today? I know, apples to apples though within the context of the technological impact within an ecomony, the replacement F\A-18E\F runs $65 million. Over the lifetime, more but no where near $600 million plus.
Keynesian economics shows up everywhere. It is literally "play now, pay later." At some point we've got to stop. My daughter is 6-years old and the impact of buying power in the years to come...one way of looking at this, and I won't get into the weeds but our current stock market is in the 12,000 range with a serious dip back in 2008. How much of this growth is real economic growth versus being propped up via inflationary forces? Well, how many jobs have been created versus how many millions have either dropped out of the work force and\or opted into near permanent welfare. A "jobless recovery" is hardly possible.
In any case, just my two cents but I'd rather us rebuild Hornets and Falcons then go this route. But that's just me...
Boo