Companies need to pay the drivers fair wages, and charge the customers enough to do so. Don't push that responsibility to the customer.
Also, the service fee is perfect example of a Dark Pattern[1].
The actual service fee option (which is pre-selected at 10%) is hidden below the fold in the iPad app (and iOS?) checkout widgets. You have to scroll to see it, but it's aligned just perfectly, and with a hidden scrollbar, to hide the additional options. If you're not looking closely at the final cart total you'll never notice the extra 10% charge.