It happens on other airlines too!!!
The last time I flew Garuda Executive Class DPS - SYD - the business class cabin was almost full (pretty unusual) as it was the start of the Idul Futri or Eid Holiday.
We noticed that the Indonesian pax were getting much better service than us Aussies. So much so they got breakfast - and we had to ask for a coffee, and that was all we got.
Far from impressed - normally the service was outstanding.
Adam