So what if people break the law and corrupt the system?

Robert Miranda, writing about requiring a photo I.D. to vote (emphasis added):

Surely Wisconsin has more pressing matters to address than just worry about a few hundred people who have, for some reason or another, decided to participate in democracy by performing their civic duty. And if they did cheat, so what? Is this state so unstable that one -- or even one thousand -- fraudulent vote (or votes) cast by an unscrupulous voter (or voters) is going to make such a difference to the political establishment of this state?