You are right. There is money for every kind of crap except what is essential.
Not only are the interstates crumbling so is the rest of the nation.
I have an old house. The foundation has failed. The basement walls are being pushed in by earth pressure. The brick walls are bowing outward and I expect to see them in the flower beds any day from now. The plumbing is shot, the windows are 50 years old and the sashes have rotted. At first glance or from the highway it is a beautiful old house and the scene of many happy memories and great times. You don’t have to look very close to see the decay. It is probably not worth saving and that is sad.
This nation is looking like that old house.
#14 From the Ground Up: Foundations
https://www.thisoldhouse.com/ideas/ground-foundations
How to Repair a Crack in a Concrete Foundation
https://www.thisoldhouse.com/how-to/how-to-repair-crack-concrete-foundation