The ninth advantage of democracy: poverty. In a democratic system, there is less risk than otherwise of citizens being left behind in poverty. There are two reasons. First, the country is more likely to be prosperous, and with more prosperity there is likely to be less poverty. Second, it is more likely that there are antipoverty policies in place. The reason for that is that even the poor have a share of political power. Competing political parties and élites need the votes of the poor, as they need other votes, and must therefore to some degree satisfy the interests and demands of the poor and those in risk of poverty. If you have the vote, someone in government is likely to take an interest in you. If you have the right to stand up for your interests, you are less at risk of your interests being disregarded.
For more detailed analysis, see How Democracies Live.
On democracy and redistribution, see The Possibility of Politics and What Democracy is For.