EPA could do nothing but spend 100% of that 8 billion on https://en.wikipedia.org/wiki/List_of_Superfund_sites for the next 20 years and it wouldn't be enough to cover it.

That's just to cover previously made mistakes. Reducing enforcement is going to keep adding to that list, and reducing safety and quality of life for all Americans.

The vast majority (60-80%, Robert L. Glass) of costs for software is also in maintenance, as any of the classic software project management books will tell you.