This urban myth has been running for decades Phil aimed either at the drugs manufacturers or charities,cynical attitude and worrying that people still believe it. I will say that of course not every charity is run as efficiently as it could be,but one would need to analyse the accounts of each one to determine which those are. Do that if you have the time.
I must say though, that an extraordinary amount of money is raised for cancer research, but then when promising treatment has produced, the NHS can't afford them. That doesn't sit well with me.
If you can be bothered to read this (as opposed to tittle tattle) you'll see that over 70% goes directly on research, about 15% is used to generate more income/donations and much of the rest is used on awareness campaigns.
There are "charities" that seem to exist solely to provide well paid jobs for their senior staff - with little or no money being used for the charitable purpose. Cancer Research UK *isn't* one of them.
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