

In the air they are highly survivable long range bomb trucks, that all these ones had to be destroyed in drone attacks on the ground is kind of evidence of that.
The US has used its strategic bombing forces for non nuclear attacks extensively as well, including known use of the B2 against the Houthis and B52 against IS in Syria.
Its just a microcosm of how being poor is really expensive, while there are tons of ways to save money while wealthy. That doesn’t end up being the cause of wealth inequality but it does give a certain inertia to those class positions.
Edit: because I misremembered the quote and vimes does present it that way.