Please, this is MAGA America, of course it's a scam. Your post is exactly why we should keep the penny.
There are many, many very wealthy people and corporations out there, and they keep track of every single fucking penny they touch, and they go to War if a single penny is missing. As an example, here you are figuring out the purchasing power of some anachronistic currency that hasn't been used in 200 years to justify it.
Those same people are now telling us that we, the working people, don't need to keep track of every one of OUR pennies, because we don't have enough of them to worry about. Don't worry, all their cash registers will do the calculations for you, and it will always be fair. We'll never round UP the numbers so you always end up paying a few cents more for EVERYTHING. It won't make a difference to you and your few pennies, but they will add up, and make the rich even richer by taking your pennies directly out of your pocket, a penny at a time. What are you complaining about? It's just a penny.
But it's my penny, and I want it, and before you call me a cheapskate, I'll remind the world that those calling me a cheapskate are the ones trying to take MY penny away. If it's important enough for them to take it from me, then it's important enough to defend it from them. I'm not giving these Jackals one inch.
Of course, the way around it is to use your debit card for everything, and your purchases will be calculated to the penny. And they will also be able to track every item you purchase, and where you are at any given moment, and every place you've been.