I think there is a good argument to be made that many companies would have created a better infrastructure by now if the government wasn't involved.
Those programs have now out competed every corporate service in the space and are either the main clearing house/provider or the second main provider in each type of US bank transfer.
They now have FedNow which is a "next gen" for these types of transfer systems and over the course of the next few years to the next decade it'll probably eat all the other systems as well as the many corporate offerings as well.
https://en.wikipedia.org/wiki/Fedwire
People arguing about public vs. private are missing the mark entirely. It has nothing to do with that. It's all about how many people have to do a task.
The US govt got to the moon and created a nuclear bomb in a relatively tiny amount of time, all entirely because it was a relatively small number of people focused on the same task. As for people who own routers? Thousands and thousands of them who all have different interests who aren't all focused on the same goal.
Getting a large group of people to do one simple task is 100x harder than getting a small group of people to do a complex task. This is why humanity got to the moon but still are stuck on IPv4.