Not going to argue against the premise, but the ADA surcharge bit was a bit heavy-handed and not an apples-to-apples comparison. Putting in a ramp would be a one-time cost to an owner. A raise in the minimum wage is an ongoing cost.
More importantly, if a business has not clearly posted notice of this surcharge where it is plainly visible and likely to be noticed, wouldn’t it be illegal to charge it in the first place? You can’t just start slapping random charges onto someone’s bill. It’s a restaurant, not Verizon.