This bit of the article is good.
“If you’re the type of person who normally goes above and beyond, you don’t want to be seen to be doing that just to get tips,” she says.
"It’s open to abuse, isn’t it? As someone who went through popularity contests at school, it was quite weird to think, ‘Oh, do I need to ingratiate myself with people to be part of this community of tip-giving?’
“It was one extra level of stress that I didn’t need.”
and this bit is utter horseshit.
He acknowledges there is a risk that this scheme becomes a popularity contest: "You cannot prevent this becoming a bit of a contest, but we already have a contest in place with the traditional system and that is sucking up to the boss.
"It is a popularity contest of who is most popular with the boss and that has proven to be a very bad system.