Toll booth cashiers in my state earn $22+ an hour. What they do is no different then a minimum wage cashier at a store. The only difference is the risk to personal injury is higher, but this is offset by great health insurance, sick time, plenty of vacation, and yes a pension. I would rather throw my money to R2D2 then to have my tax dollars wasted on overpaid cashiers.

It's safe for the environment. This deserves some advanced research just on that point alone.

Earth's gravity is just fine for me. :)

If you have to recruit engineers to work on your project, that might be an indication its time to move on.