You may think it says nothing but many, myself included, would disagree.
Try clicking on the link provided. That may help.
Your link claims, for instance, that it makes sense to tax government because government is now taxed for its employees through withholding and payroll taxes and must pay contractors a sufficent amount to cover payroll taxes for their employees and withholding. The pdf says that to leave government untaxed gives it an unfair advantage over private enterprise.
It seems that government, under the FairTax, is treated as an end user (private consumer taxpayer) rather than as a business. Assuming that government employees too, will get their entire paycheck without taxes deducted, that would put government expense where it is now - in other words it would still be paying the same amount for its employees; however, if government is required to pay an additional 30% FairTax for each employee (something private business or nonprofits are not required to do), it is paying almost a third more under the FairTax than it is now.
While I may not be fond of government, I do recognize that government generates income through taxes, and people pay taxes. FairTax on government is like cutting off one's nose to spite one's face.