Thankfully, Ezra Klein is around to defend the IRS. He even came up with this little tidbit:
Every year the IRS collects data on "the tax gap." The tax gap is the difference between the taxes the agency knows it's owed and the taxes the agency has actually been paid. In fiscal year 2008, the tax gap was $345 billion. That's about 14 percent of the total taxes collected that year. And you know who makes up that shortfall: those of us who didn't dodge our taxes.
We could have lower taxes overall if people would actually pay the damn things. And if slimeball accountants and lawyers stopped enabling those tax dodgers. As is pointed out in the article, the GOP has made it harder for the IRS to collect taxes, meaning tax rates are higher than they need to be. Small government gone wrong.