Apologise for the vague title I wasn't quite sure how to word it

A while ago I was reading a critique of current (post-cold war) defence expenditure and it was essentially arguing that some equipment (one example was the F-22 Raptor) is so costly and complicated that in a major conventional war (i.e. what they're ultimately designed for) they would prove to be useless.

I appreciate that with increasing sophistication, equipment costs etc will rise but I was just wondering what the military inflation rate was like over the course of the Cold war?

For example, relatively speaking, how many F-86 Sabres could I buy for one F-22 Raptor (i.e. two aircraft designed to take on the Soviet air force)?

Relatively speaking how much more expensive is 'modern' (i.e. Post-cold war) military equipment relative to its earlier equivalents e.g. F-86 vs. F-22?