> You seem to ignore my point, which is that people who vote for higher tax rates and increased redistribution of wealth are not actually doing very much to solve any real problem.
This requires the assumption that the distribution of wealth that is being address is not a real problem.
> Voting to raise taxes on the rich demonstrates little personal responsibility, as the voter does not pay to solve the problem
Payment to solve the problem is a method to "demonstrate personal responsibility" because it is one method by which one exercises one's power to solve a problem one has perceived, but voting is equally so a method to "demonstrate personal responsibility".
> and does not even try to convince others of their moral responsibilities.
Well, sure, voting itself may not be an mechanism for trying to convince others of their moral responsibilities (then again, it may be, people have been known to cite drawing attention to an issue and raising awareness to be motivations for voting behavior on issues and candidates), but even where it is not it is often not an isolated behavior, people who based on a preference for a particular policy very often engage in advocacy around the policy, including advocacy based on the premise that it enforces a moral obligation.