Employee disappointed by recent raise

DEAR HARRIETTE: My assistant has been doing a good job at work, so I offered her a promotion and a 20% raise. I was surprised and disappointed by her response. She said she thought the raise wasn't enough and that she deserves a lot more. I run a small business and do not have more to give her. I never know if all of my current contracts will last, so I have to keep sizable savings in order to pay…