When tipping gets too much

Here is the story:

A fcuking rich business old man treat 5 of his employees to a night of fun at a ktv lounge.
They ran out of whisky, they decided to ordered one.
The waiter acknowledge their order and bring in their new bottle of whisky.
The rich boss tipped the waiter $20 for his effort, the waiter was surprised. ( He wondered whether he should reject his tips... but if he did reject, the big boss might lose face in front of his employee and he might complained against the waiter, so the waiter decided to just take it anyway, just to play is safe)
Hours past, its billing time.
The waiter brought the bill and showed it to the boss, it totalled to $2900. The boss handed $3000 in cash to the waiter.
The waiter got back with $100 in change, the boss again tipped the waiter $50.
What the hell? The waiter earned $70 just for this little effort? The waiter was stunned too. The waiter noticed the boss was in a good mood and so he decided not to spoil his mood by rejecting his tip.
Who is this waiter?
Its me, yours truely.
I am stunned.
Good night.