If one person has a right to something he did not earn, of necessity it requires that another person not have a right to something that he did earn. To argue that people have a right that imposes obligations on another is an absurd concept.
The entire article is a must read and is summed up nicely by Williams:
None of my argument is to argue against charity. Reaching into one's own pockets to assist his fellow man in need is praiseworthy and laudable. Reaching into someone else's pockets to do so is despicable and deserves condemnation.