I personally don't believe you should expect to get paid for staying home to be a mum. Although a lot of families do get FTB etc. if they are entitled to it, to boost the family income.
Comparing BB and PPL is comparing apples and oranges. PPL is for women who have worked before they had their baby and it's really in place of paid Maternity Leave. BB is that, a bonus to help out with the cost of raising children.
I know many will disagree but i don't expect to get paid by my Government to stay home with my child.