Why should undocumented (illegal) aliens be required to pay sales tax?

In a number of states, laws have been passed to deny undocumented people the right to a number of things available to citizens – licensing vehicles, work permits, welfare, and so on and so forth. And aliens cannot vote. Some of these laws are being argued in the courts and some of the details may change. But the bottom line is that illegals are not provided the same benefits that a citizen is. By design.

If that’s the case, why should the illegals – undocumented people – have to pay sales tax? Is that not ‘taxation without representation’?