And now imagine doing this in a world where there was no federal tax, the GDP was pennies (relative to today), and state of the art technology was us being on the verge of discovering that handwashing before surgery was a good idea. Really! [1] And the big goal here was to be able to put up 'electric lanterns.' It sounds so pie in the sky as to be unbelievable. And indeed it probably would never, in a million years, happen today. But it did happen in the past, and for that we owe our predecessors quite the debt!
The point I make with this is that we have just an unimaginably vast level of economic power today, but it's mostly being squandered. We should be trying out grand ideas, endlessly. If we can make them work - awesome, we've radically improved the world and humanity - our descendants will thank us. If they fail, we can call it a jobs program -- certainly a much better one than trying to make stuff to go kill people half way around the globe.