kintyred, let's detach your idea of additional pay for CR, IRE, Auth etc from a purely aircrew centric approach.
Whilst I achieved various command categories, ratings, leader etc I also did weapons, int, security, admin, audit, contract and so on. Let us suppose that each of these qualified for additional cash rewards. Where is the money to come from?
That is a complete no brainer. It would come from exactly the same size pay pot as your pay comes from now. Assuming you got all the appropriate ticks then you would earn little more than you earn now, but on the way you would earn considerably less.
As a first tour, no-nothing, hot-shot you would understandably be paid half what a similarly newly-qualified fg off/flt lt earns now. Learn from PAYD.
I leave you to work out the rest.