Today, the ditch digging s done with small excavators, not with hordes of guys with shovels...
Alternatively the government could subsidize wages. Agree to pay x% of the wages for certain industries. Which is basically what we already do extensively with tax breaks for companies that create jobs. But that's also not politically popular (with the left.)
As automation replaces more and more of the unskilled workforce, we should just accept it and adopt a basic income.
Maybe. There are still vast pools of unskilled jobs that exist globally. They're vanishing in the US in no small part because our industries are forced to compete with business concerns that can take advantage of what equates to slave labor in less developed parts of the world.
There remains a hell of a lot of fiber needs laying.