That only works if earmarking for issue B is not common, but if some media story suddenly made earmarking for issue B 50x the general fund / issue A, by people

That only works if earmarking for issue B is not common, but if some media story suddenly made earmarking for issue B 50x the general fund / issue A, by people in aggregate, your not going to be able to do that well. What you talk about is much like the arguments against voting, while such logic makes society lose it's prisoner's dilemma for change.