Not really. Tips, for many, are a reward for a job well done, above the expected.
For me, if I go to dinner and my basic needs are met, then a minimal gratuity may be given. However, if the service is engaging and extending my experience (i.e. recommendations, personalized service, extra benefits) then the gratuity will reflect that service.
A line item on the bill means that all optional and extended gratuities are put away.