US tipping culture has changed in recent  years, causing debate in the service  

industry. One of the biggest changes  has been the rise of digital tipping. 

In the past, customers would  typically tip their servers in cash,  

but now many restaurants and other  businesses use digital payment systems  

that allow customers to tip electronically. This has made it easier for customers to tip,  

but it has also led to some customers feeling  pressured to tip more than they would otherwise.

Another change in US tipping culture has been  the increase in the expected tip percentage. 

In the past, a 15% tip was considered standard,  but now many people expect to tip 20% or more.  

This increase in the expected tip percentage has  put a strain on some customers, especially those  

who are already struggling financially. The changes in US tipping culture have  

caused debate in the service industry. Some  servers argue that the changes are positive,  

as they have led to them earning more money. Others argue that the changes are negative,  

as they have created a more stressful  and demanding work environment.