scope of practice

Recently Dr. Jeffrey Singer wrote about the one hiccup in the COVID-19 plan to “test and treat.” Pharmacists are not allowed to prescribe Paxlovid. He makes a compelling argument, but there are some downstream consequences that we should also consider.
Scope of practice, who can do what to whom, is a contentious area. There is fighting between those with large scopes of practice, such as physicians, and those with a lesser range, like advanced nurse practitioners, physician assistants, and specialty nurses, like those working the critical care areas. Who decides one’s scope of practice?