Moral for troops are difficult to raise, which tech would you think could do that? Supersoldier serum, hypnosis, shoot-your-leader tech?
Moral for troops is more from good weapons, earned confidence in your officers, generals and head of state/government.
Once again the abstraction labelling department confuses someone.
Morale in HOI3 is not the troops' willingness to soldier on. It is a number which affects how quickly they regain Organisation. In many ways, ORG is more like morale, and what HOI3 calls "Morale" is more like leadership and other CCC functions. When a unit is routed (i.e has to fall back in disarray) it's the organic organisationa abilities and contingency plans and leaders giving sensible orders that reach the now-disrupted troops.
So some sort of tech like "despatch riders" or "platoon level radios" should increase ORG regen. CasEvac affecting Morale in HOI3 is just the developers confusing themselves or
ab intio failing to comprehend what it is they're trying to 'model'.