Is This A Discrimination?

At first, the company that I am working employs the disabled people as the contribution of society actively.

And then, I met her in my present working place.
At first sight, well still now, I can't admit she has a handicap.
She is very talkative, cheerful, and a hard worker.

At my company, they are given a wage increase, moreover they are given the bonus if they work for more than one year and half month.
For other staff included a full time worker like me, it is very difficult to get a promotion or an increase in salary.

Is this a discrimination?

Actually I don't know. To tell the truth about money, I really envy them because I know it's pretty hard to promote.
But, they must have experienced many disadvantage in their life.

We can live freely except for some restriction.

Last night, she toled me her troubles.
She disclosed to me that one coworker (Miss H)was tough to deal with.
The reason why was she was very strict any time, moreover she didn't say hello smily to only Miss S.

I remeemberd Miss H's thinkng with lietening her talking.

Miss H said to me before, " I come in contact with her (Miss S) very strictly because her salary is higher than other staff even if they can do a lot of things on the job. That's why I request her more than others."

That's right. She must be right.
But, I can't do that. I am easy to people and to myself.

They will work together for a few years at least, so Miss S's bitter annoyance will have been kept.

I was noticed my helplessness.