I hate that this happened. The inversion is a bad thing but it’s the government that sets a bad environment encouraging companies to do this in the first place. Instead of government retreating and eliminating the bad environment they add more government rules, killing the deal and wasting Pfizer’s $150mm break-up fee based on de facto regulation changes. The logical conclusion to all this is that eventually you will have to get the government to sign off on a PO to get pens from Staples. Just awful.
The regulations these types of companies already have to deal with are mind boggeling. Heck even your local doctor has a massive amount of regulation to contend with.