This made be curious, so I looked around. FWIW, healthcare constitutes ~11% of the workforce in the US. It's ~16% in Germany, ~10% in the UK, and ~5% in France.
As a percentage of GDP healthcare is far higher in the US, of course.
If you add in everyone in insurance, pharma, devices, and the jobs those support, that number seems to be closer to 17% of the workforce from what I could put together.
Not sure if those in Europe do it similarly, but it just feels like a huge number of people. Maybe that is the result of demographics and a topheavy population, though.
Nor does it count any of the people who really should have more or better care but don't get it.
And thanks to technology and science our first world society's got really good at keeping people alive and relatively comfortable.