Roads most certainly do earn the money invested in them. You just have a brain too small to understand the concept.
Really? How many roads have made it into the Fortune 500?
Are roads taxed on their earnings like people? What does a road spend its money on, anyway? Making itself look good to other roads?
You can't possibly be as stupid as you seem... or perhaps you're exactly why motor oil containers have language stating "This is not a food product" on them.
Lolz!