It’s interesting that environmental impact came up but healthcare costs didn’t. If I was footing the health insurance bill for employees, I’d definitely look for ways to incentivize healthier practices. If they are providing food, it would make sense that it would be in the best interest of their bottom line (not to mention the well-being of their employees) to be selective about what they serve.
I don’t agree that it needs to be a slippery slope and apply to all meal reimbursements for travel, etc. They are choosing their cafeteria menu anyway, so they might as well make those choices in an intelligent way.