A Freudian slip?
I think the previous poster was referring to the fact that some organisations will always spend their budget, whatever budget that is. You could give them an extra 10 million, or take away 3 million, and their message would always be the same. They never need to rationalise by saying "well, the first 100 million was able to achieve this, but the next 100 million didn't double the benefit, so we might as well give it to a different good cause".
How would you feel if the money taken from the fire budget was given to foreign aid, or domestic aid? It all comes from the same source, ultimately. There's only so much cake to go round.