What happened to Boehner here is a symptom a lot of politicians are noticing. As the weeks tick away since the Arizona shooting, they're slipping back into modes of rhetoric they'd grown comfortable with over the last years. Of course, they'll continually readjust and correct themselves for the next long interim, but they're on the slow slide back to the status quo ante.
On to the merits of his argument. Republican state houses and legislatures across the country are participating in an organized effort to undermine public sector unions. One of the GOP's arguments against allowing state and local workers to organize is that they provide services as part of government monopolies and therefore have outsize bargaining power.
That's not the case in Wisconsin, where public workers have agreed to every financial concession asked of them, and are fighting simply to keep their organizing rights.