Or should anyway. But nope, money first, people second.
On-topic: Workers' rights have taken a backseat due to aggressive lobbying for several decades, not least in the US.
Even in countries with very strong socialist foundations unions are hollowed out to the point where entire fields like IT feel like they have no use for them. Sweden is a good example: IT professionals are sought after to the point where they currently (rightly) feel like they have no use for unions, but when they turn out to be the new factory workers they won't have an already established base to unionize on.
Maybe I'm silly to worry, but I feel like this is all a pretty big mistake.
If you're in an industry where hiring costs are high (eg software) then it's often cheaper to keep staff happy than to recruit new ones. 'as little as possible money' is sometimes spending more now in order to save a larger sum of money you'd have to pay out on recruitment if someone left.
That said, I strongly suspect this is not the case for delivery drivers.