There was a thread years ago that actually showed a printout by cabin and it showed who had prepaid gratuities, who was daily and who had removed.
No other financial information and not sure why some think the 2 are related.
To me, providing this information to the stewards would be an incemtive for them to ensure that they provided top notch service as many do remove gratuities and tip in cash as opposed to a reason to provide inferior service.
JMO