The hacking of a UnitedHealth affiliate is a symptom of consolidation within the health care sector, and it’s likely to get even worse.In a bid to win reelection, the Biden administration keeps trying to sell the country on all the supposed benefits of Obamacare. Before continuing their sales campaign, they might want to check in with the doctors’ offices struggling to make payroll.For over a month, the multitrillion-dollar health care sector has had to respond to a hack on a payment processor owned by UnitedHealthGroup, the nation’s largest insurer. Axios reported that hospitals, doctors, medical equipment suppliers, and pharmacies are...