I disagree strongly. Concentrating responsibility concentrates power, which is dangerous. Governments should share power internally, share between levels (federal, state, local), and leave a lot of the power with the people (who may use it for private enterprises, NGOs, etc.).
You imply government policy does not follow trends and whims, which is observably false.
What I am implying is that, unfortunately (again), government is the one entity that the common person is given a say in. They aren't a member on any boards, they don't manage philanthropists' thoughts or funds and they own no capital from which to generate their own wealth.
What I am implying is that they can influence the government into addressing their needs, even if superficially.