How do you feel about your company asking you to donate to their charitable efforts?

I work for a large tech company. We work, they pay us and now they're asking for some back. I know its not a lot compared to what they give me but it gets on my nerves. I'd rather donate to what i want and claim the tax credit myself. Can they not appreciate that ive been underpaid for 20 years and financially set back by two divorces and i am trying to catch up so my wife doesnt have to work when i die? Why don't they just use their own money? I didn't get a raise last year