Every year, you need new ideas to make business better. This is something that you can usually futz with, and maybe get a little bit of bang.
It's not necessarily about pricing template being better universally. It's just that these are factors you can move around, "optimize."
Having multiple levers is just helpful.
This is also an orthodox negotiation model. It's always helpful to negotiate multiple items simultaneously. Salary, benefits separately, pension separately from that, days off, personal days etc.
It's very common that one is a hard no, but others are not.
I know it seems to make sense to transparently aggregate everything.. but... The phenomenon exists regardless.