I wonder if physiology is at play here. objectively setting the price at .95x and giving the buyer the ability to incentivize the quality of service by tipping

I wonder if physiology is at play here. objectively setting the price at .95x and giving the buyer the ability to incentivize the quality of service by tipping is better than setting the price at 1.15 regardless of the quality of service. Tipping gives the buyer an ability to incentivize the service provider Usual disclaimer of this being a thought exercise