That's a good point. I think taxes in Australia are a little higher than in the US, but overall the net cost to an individual seems lower.
So to your point, my wife works as a radiologic technologist, and I've been able to get some details about how many procedures can be done in a day, etc.
The average insured family spends $10,000 to $15,000 on health insurance a year. Say the family has no health emergencies, except dad slips and falls on some ice, and needs to have his knee imaged via magnetic resonance (MRI). The cost of the MRI, $8,000 to $10,000, with ~$500 going to the doctor who inspects (reads) the images. The family typically has to pay the lesser of $500 per incident or 10% of the cost. So they have to cough up $500 in addition to the $10,000 they already paid. But they paid the $10,000 out over 12 months so while the $500 seems like a lot, the $833 per month didn't.
But... With a single MRI system, a knee can be scanned in approximately 30 minutes. Radiology departments typically offer this service from 7:00 AM to 7:00 PM. Then they can perform some where between 12 and 24 procedures a day. At $8,000 per knee, an MRI scanning knees all day would have a gross revenue of $192,000 per day!
High-end MRI machines cost between $500,000 and $1,200,000 each. The operator is paid about $25/hour, and the cost in electricity and servicing is probably less than $5000 per month.
So if you owned and operated a high-end MRI machine in one years time you could have the net revenue of:
$49,920,000 (gross) = $192,000/day x 52 weeks x 5 days/week
($138,000) (COB service/employment) = $5,000/month x 12 months + $25/hour x 12hrs x 52 weeks x 5 days/week
($50,000) = Real Estate
That's a lot of revenue. Now, I know I've left out benefits for the MRI technologist, cost of supplies like MRI dye, house keeping, and medical supplies. The estimate for the cost of real estate may be low too. There may even be more cost in operating the machine itself.
Even if it cost an additional $2,000,000 a year to operate an MRI machine, the system is net revenue generation for the operator whether that be a clinic or hospital.