Laws like this make great talking points on the campaign trail, but I doubt anyone thinks there’s a path to enforcement…especially since almost no Americans care enough to change their behavior on these fees.
[1] exceptions are usually some sort of limit. For example in a restaurant there may be a mandated service charge for large parties, that sort of thing. But 99% of the time if I see a price, I pay that number, to the penny.
I freaking love how trivial comparing prices comes when the unit price is shown on the price label. This also really gets through the bullshit of misleading packaging design. (Making products look like they have more product than they really contain)
If a large developing country (almost on par in population and area size to the USA), with extremely messy bureaucracy and taxation system can do that, why can't the USA? I have to believe it's by design and choice, not from a lack of need or capability.
How did the federal government end up nationally banning all fun drugs aside from nicotine and alcohol? (it just did it, and even when states legalise e.g. weed, weed vendors are locked out of the proper banking system: https://en.wikipedia.org/wiki/Comprehensive_Drug_Abuse_Preve...).
How did the federal government make ~every state have the same (mad) drinking age of 21? (federal highway funding blackmail: https://en.wikipedia.org/wiki/National_Minimum_Drinking_Age_...).
the constitution is not an actual barrier to the federal government doing things over the heads of states.
In Germany and Europe it's simple: the price on the item is what you pay at the cashier, at least of you pick the cheapest payment option (cash).
Most don't bother to charge for other payment methods, a surprise price basically never happens.
Credit card payments are capped at 0.3% of the transaction value.
Large credit card cashbacks don't exist for that particular reason. But it's dead simple to know the price.