give medical professionals more operational and financial freedom to run their practices using tried-and-true free-market principles.They are not tried and true. A friend of mine worked as a QA engineer at my city's most prominent children's hospital (a minor power on the world stage). His thankless task was to find ways to improve communications between departments and curb the errors. It was simply not possible - every doctor had their preferred provider, sometimes from merit, sometimes because they liked the shiny goodies that the sales reps brought.
All the individual systems interoperated very poorly, and none of the physicians would budge, and the hospital administration could not force their hand. Any time admin tried to regularise something, the affected physician would just state "If we make this change, children will die". It didn't matter that everyone at the table new that this was a total lie, because the official authority for that department (or speciality) was that specialist. They got their 'free market', being able to use their preferred products for each individual specialist, for personal preference at the cost of better overall treatment. The whole was very much less the sum of its parts.
Another friend became a sales rep for a pharma company. The rep she took over from was a fairly standard rep, but she was quite ethical, and would only allow her 'freebie' budget to be used on things that developed the practise. Some doctors already do this. Others were more like "ah, well, the ride is over with this rep". Some were absolutely outraged that she should dictate to them what this 'extra income' was spent on - how dare she suggest medical charts instead of football tickets?
I myself have personally seen a specialist in a field report on some clinical studies so badly that we technicians had to go to other specialists and get them redone. That specialist didn't get any more of that kind of work at our practise, but his utter incompetence was never followed up beyond "don't hire him again".
I guess the moral of the stories are that freedom to run practises as you see fit does not mean ethical (or even ethically neutral) behaviour, and that an environment where every physician uses their preferred products does not mean better care is delivered.