I've always wondered why someone hasn't tried to reverse the model on these delivery service apps (postmates, doordash, instacart) Instead of delivery people

I've always wondered why someone hasn't tried to reverse the model on these delivery service apps (postmates, doordash, instacart) Instead of delivery people blindly accepting orders and hoping for the best, the people who are requesting the delivery should have to set a rate at order time and make the full order and destination visible so couriers can decide if it's worth it and make a counter-offer if it's too low to be worth it. If you ever go read what the workers are saying in subreddits for these services, it's clear that the incentives for quick and accurate deliveries just don't line up with the current gig system.