This is 100% incorrect; you've entirely misunderstood the discussion in this thread, the OP Chronicle article, and the Politico article that _that_ is referencing. You're confusing that discussion with an entirely different concern about the ACA (the mandate causing fulltime jobs to be cut to part-time jobs) that is completely irrelevant to this discussion.
From the OP article:
> In February he published an article in Politico celebrating a projection that the Affordable Care Act might result in millions of workers’ scaling back from full-time to part-time jobs.
From the article referenced by that passage (and linked directly from it):
> This week, America’s political class has been consumed by an intense, vitriolic debate over a single number: 2.5 million. That’s the amount by which, according to the Congressional Budget Office, President Obama’s signature health care law will effectively reduce the U.S. work force over the next decade. The initial Republican reaction was predictable: Pundits filled the airwaves, Cassandra-like, to paint Obamacare as the ultimate job killer. Never mind that, reading the fine print, it’s clear the CBO was talking about workers voluntarily reducing their hours in response to the law—not getting laid off or seeing their shifts scaled back.