I don't really care that service is mostly paid by extra money that are not factored in the price I see on the menu. It is an annoyance, but it's not a huge deal. What bugs me is the calculation; it should be based on the number of items brought over plus some flat fee or something like that not on the price of the things I order. The service is (or should be) exactly the same regardless of what I order. The ***** brought over 40 bottles, surely didn't bring them separately in 40 individual trips, let's say 15 trips, one trip takes say two minutes, another two minutes of small talk with the customers per trip, so let's make it an hour of her time and she expects to be paid 16,000 (SIXTEEN THOUSANDS) dollars? Jesus Christ, not even senior partners in absolute top elite law firms charge that, we're talking like rates of the top-tier lizard overlords at Goldman Sachs or sth.
Obviously, this is an extreme case, but the principle that the tip is a % of the ordered things irks me even when it results in much less outrageous numbers.