Very often there are no drugs at the moment, and oncology is such a thing that cannot be delayed, and sometimes people urgently open fees in order to purchase expensive medicines for the funds raised. Even in our country, I cannot say, because not a healthcare worker, but as far as I know, we do not undertake to treat stage 4 - they only offer palliatives, and abroad they take up 4, here are the fees for treatment in Germany, Israel, Korea, etc.
the state has a spending limit, i.e. health care with this money maintains polyclinics, hospitals, provides institutions with medicines, treats common diseases. but there is not enough money for oncology, as well as for many other diseases