Whom should you tip?

In which country should you tip ALL of these people?

  •     Grocery bagger
  •     Parking lot attendant
  •     Valet parking attendant
  •     Gas station attendant
  •     Garbage collector
  •     Taxi driver
  •     Delivery person
  •     Hairdresser
  •     Hotel bellman
  •     Airport porter
a.  USA
b.  Mexico
c.  Argentina
d.  Switzerland
e.  Australia


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