At the start of the second season of Succession, the viewer knows the personal hell that has landed Kendall Roy at an Icelandic drug rehabilitation centre. But as he immerses himself in a spa amid picturesque tundra, it looks like a heavenly place to be.

The idea that recovering from addiction can be a luxurious experience is one being eagerly propagated by Australia’s booming number of high-end rehab facilities, where $10,000 a week or more buys you the chance to get clean in style.