Charity and tax deductions – does it defeat the purpose of charity?

When you make a charitable donation you are able to claim it on your taxes and you receive a deduction.

This would obviously be a benefit and urge some people to donate more, but to me I feel it defeats the purpose of "charity." I always thought of charity as a give something for nothing in return sort of deal… but maybe I am wrong?

Do you feel as though tax deductions for charity is defeating the purpose of the meaning and integrity of charity?