how to get employers to be more supportive?

I was at BJ's today and had to wait awhile at customer service while they looked up my membership. While I was waiting, the manager and I started a conversation about babies- we figured out that our babies were born only days apart!

We were talking about how hard it is to get out of the house when you have a newborn in the winter and I mentioned that my DD wanted to eat all the time and that made it hard to go anywhere more than a few minutes away. Her eyes got big and she said, "Oh I know, my son absolutely loved to breastfeed. When I came back to work they had to feed him from a syringe for a while before he would take a bottle." At this point I felt pretty comfortable asking, "So is BJ's supportive of pumping?" She looked at me sadly and told me no, that she had to return to work when her son was 6 weeks. She wasn't able to pump frequently enough and she lost her milk very fast. She said it was the hardest, saddest thing she has ever had to do- weaning her ds at 2 months because she lost her milk and couldn't pump frequently enough

Yes, I know there are herbs, etc that she could use... I didn't get into that b/c she seemed so about losing her milk. And at 6 weeks, I'm not sure it would have helped anyway. As I shopped I felt myself getting angrier and angrier at that place, and all other employers who do not support babies and mamas in breastfeeding. I ended up not buying anything b/c I didn't want to support them.

So how do we lobby the gov to give mamas more time off and employers to support them when they go back to work?