Opposition health spokesman Jeremy Hanson said the proposed buy-out had no proven health benefits and its economic arguments were flawed.

''I think that the argument that it becomes more efficient and effective because the bureaucracy takes it over is flawed,'' he said.

''There is nothing to suggest that ACT Health will do a better job than the Little Company of Mary just because they take over the bureaucracy.''

The hospital already provided top-quality public hospital care and the $77 million could be spent reducing elective surgery lists, he said.

ACT Health Minister Katy Gallagher said the Liberals failed to understand the economic benefits.

For more details on this story, pick up a copy of today's Canberra Times.