The government isn’t a business. It’s a public service and I never hear anyone bitch about the wasteful spending when it comes to the military. I don’t understand why the post office is being treated like a for profit business.
The government is not a business, but it has limited resources as everyone else.
If those resources are spent on delivery drivers, they’re not spent in anything else. I’m not American, but if I were I would much rather those resources be spent on affordable healthcare for everyone than on food delivery for everyone.