Imagine a large barrel that we pull apart, reconstruct and expand (at considerable expense) every year.
Imagine we need to store a certain amount of precious liquid in that barrel. Now imagine that the amount of liquid we need to store each year is rising faster than the volume of the renovated barrel. The result is overspill and flooding, which makes everyone unhappy.
Here we have a description of the NHS crisis.
Full story in The Independent, 21 February 2017