Let them have an inch, they want a yard

Sometimes I get fed up as most normal warm blooded human beings.
In my job, it's a necessity to keep a check on me temper most of the time.
Some clients are just impossible. They push and they push.
"What benefits will I get if I sponsor such and such?"
"What extra things can i obtain by going with your proposal?"
"What else, what else can you give me?"
More and more and MORE!
Sigh...I want to say to them, stuff it!
Lol, ahh well that's life I guess. You get the good and rotten apples all in one basket.