Hi misslideaway,
If you were able to investigate, you would find that all charities operate very differently.
The big national, multinational and international ones, by virtue of their size, need staff & offices etc., just like a big business, which is how they must be run to be at all succesful.
However, reports suggest that yes, some are run more competantly and cost effectively than others. In general, the very small charities run by the one or two people who started them mostly need your support and generally use most of their own spare cash to support their own cause.
For example, a couple of friends of mine have commited all of their own cash, their farm and the rest of their lives to their cause and if you would like to know more, please take the time to look at www.ancraa.org.
Thanks for your patience in reading this.