We don't know anything about Donnie Wahlberg, so it's possible he's making a clever joke about dumb people. But we're leaning toward Wahlberg just being unfathomably terrible at math. For what it's worth, the Obamacare website didn't cost anywhere near $600 million, and there aren't anywhere near 300 million taxpayers, so literally everything in that tweet is wrong.
Update, 5:15 p.m.: Now we know: Never overestimate Donnie Wahlberg.
Thats only $2 a person. Enough for half an aspirin! Screw it. Forget what I said! Load up the website and healthcare for all!— Donnie Wahlberg (@DonnieWahlberg) November 15, 2013