How would you treat them?

This world is divided into many different level of living life. You have the rich, poor and average.

But what I wanna say here is another way of level. such as:

- master = including bosses and owner
- worker = staff, part timer and so on.
- servant = maid and so on...

I realise more than 60% of the people put there are treating servants like animals... WHY?

of 1 example... TRUE STORY,
my grandma in very sick n old, so my family hire a maid to take care of her. The maid was very nice and good. she wash my cloths and also took care of Ah Ma. She says good morning, good night and hello to you.

I finish work around 11pm so when I reach my grandma's house it will be about 11.30pm (coz i'm staying there for now) I assume that she would be asleep by then so I have to wash my cloths my self because I have to wear it again tomorrow morning. But... If she is not asleep, she will come out and wash my cloths for me. that day she even wash my car for me *but I told her no need to wash* she treats Ah Ma nicely.

But what I dont understand was...
My aunt and uncle keep saying that she is useless. say that she dont know how to take care of other people, say she simply give ah ma eat things and med. say many bad things of her and even 1 of my aunt keep talking to her like scolding her (Shouting) sometimes... not shout but in a loud voice.

Why does this happen? is it because they think they are at the higher rank and deserve to talk to her rudely? is it because they are her bosses? is it because she is just like a thing for them to throw out their anger?

Why cant you just say please and thank you...

now a question for everyone... How would you treat them? someone lower level than you...