While this comment has been downvoted at the time I write this, it has some good points. First, malnourished women still make pretty decent breastmilk, although there's a point at which that is no longer true. Second, it is abusive to institute practices like routinely separating mother & infant at birth, which dramatically impacts breastfeeding success for the worse. Formula is expensive and breastmilk is free (although it certainly takes time and effort, and pumping isn't free). Fostering dependence on a commercial product when it's not necessary and the parties involved are poor is really immoral. When you have a choice between formula and diapers and bus fare to your job... what do you choose? Your breastmilk has dried up and letting the kid starve is not an option. (Plenty of moms in this situation do water down the formula a bit to try to stretch it a little longer, and this has its own harms, but they're reasoning that missing the bus is the first step on a path to homelessness which is also a great harm.)

What country are you talking about? Are you familiar with WIC? In the US there's no woman from sea to shining sea who should be going without formula unless she sold it to buy drugs! And if WIC won't provide enough, there's literally thousands of churches and other charities out there falling all over each other to help infants in need.