It’s already happened
James Meek: The NHS Goes Private, 22 September 2011
“... the private sector sets aside for corporate sheen, although it does have a museum dedicated to John Charnley, who, almost half a century ago, pioneered the popular benchmark of the NHS’s success or failure, the hip replacement operation. They still do hips at Wrightington, and knees, and elbows, and shoulders. They deal with joint problems that are too ... ”