@Miller,
The way I see that, is that the Doctors are sending their patients to a place they know will do the tests/screenings correctly as well as safely and hygienically at a cost to the Health system...
So, they would prefer that "people" attend a lesser frequented place, that probably runs on skeleton staff, therefore charge less, probably rarely do tests so not as pedantic so the State can save more money.
I'd stick with my Doctor's recommendations any day...But, I can imagine, people will fall for it, as they will advertise it well...Aiming it as "choice" and money in your pocket....