As an individual receiving service, anyone is free to give the provider of service a tip if they so choose. Some industries expect tips, ie, the restaurant industry where the employees make so little houry that tips are essential to their very survival. Many other industries, such as satellite installation and maintenance, do not expect tips as their people make a reasonable hourly wage. HOWEVER, if one receives outstanding service that goes beyond the call of duty, or one simply has considerable resources and a kind and reflective heart, tipping is a perfectly acceptable practice. For example, I was once struggling and dirt poor, but now I make a six figure income. I fall into the "resources with kind heart and reflective heart" category so I do tip periodically where tips are not traditionally expected -- it makes me feel good and I know that I probably really made someone's day who might be struggling a little in their life.