The public good comes from good things being done.
The state does not, and cannot, have a monopoly on goodness.
You'd be removing a significant proportion of kindness if you banned charities and charitable giving, you'd be removing it completely if you banned all charitable actions as well. The ideal is not "all government" or "all charity", but co-existence. There has to be enough government strength to prevent the strong individuals dominating the weak, but not so much that people are reduced to naught in excess of blind subservience to the law.
( Moon Girl Technologies horrendous beanbag, Thu 14 Jan 2010, 23:21, archived)