“I’ve made bought a machine that does the labor of 10 men!”
“You’re going to still pay the other nine, right?”
“Why? I bought it to get more of the money to myself. Why would I pay for something and get nothing in return? Why would I just lose money for no reason?”
Seriously though, the dynamics are pretty clear, there’s no investment without the expectation for extra profit (even for a state. Invest in a new railroad with the expectation of higher economic activity and therefore more taxes). Otherwise it’s just charity