[LaLaLand122]

Not exactly what you ask for, but "the NHS budget has traditionally risen by an average of 4% above inflation each year." (https://www.bbc.co.uk/news/health-64190440)

[nradov]

Obviously NHS funding can't continue growing faster than inflation forever. That is unsustainable. At some point the NHS would consume the entire government budget.

[SideburnsOfDoom]

And also, the population distribution can't continue skewing older indefinitely, that's unsustainable. At some point geriatrics would make up the entire population.

And yet, both of these trends can continue for quite some time, and one trend can outweigh the other for quite some time.

[fidgewidge]

That's the rate which causes people to argue it's being "defunded".