I have to say, the idea that breast feeding is the purvue of the wealthy (privilege/etc) seems...off. Scratch that, it seems like the absolute opposite of reality.
I have a good friend who provides lactation consulting, almost exclusively to lower income mothers/mothers-to-be. This service is provided and paid for by a mix of local .gov and charity financing, as far as I know. It's a valuable service in that younger, newer, poorer mothers may be terrified of it...and this type of education and consulting goes a long way to removing that fear.
Formula, AFAIK, has *always* been expensive, compared to breast feeding. That's the high order level of expense of it. So in cases of necessity (dry breast, "tube" boob--can't recall the name, don't google for it but it's a condition that makes lactation and breast feeding painful and difficult for the mother if done wrong), mastectomy, or just bad luck...it makes sense to have that option subsidized.
What doesn't seem to make sense to me is this weird idea that formula is the preferred option. And it may be, but if so...that should be where the wealth divide becomes apparent. Privileged mothers can afford it...some can't.
If the issue is more of a time/work thing, I can think of a LOT of ways to handle that with simple policy, placing the burden of the cost of a feeding room on the company. Hell, even subsidize THOSE, and mandate them.