Different payments have different requirements. Ppl is payable based on mums work history. Dad is ignored (essentially). It is not deemed a warfare payment. Baby bonus is deemed a welfare payment for families and 75k in the six months after birth has been deemed the low to middle income range. It is paid based on the "right now" circumstances for those six months. Cap no matter what happens before it after, in that six months it is known you earned less than the limit so you are entitled

I honestly don't know who comes up with the numbers or how! I just have to know how they're applied! Sorry