My elderly parents, fervent Democrats, volunteered for the Peace Corps in their retirement. What a fiasco. While they were terribly earnest folks, neither of them had any skills whatsoever that were useful in the Latin American country to which they were sent.
Not only that, but they cost the U.S. taxpayer mucho $$$ for their support, which included their hospitalization for parisitic disease, which they of course contracted in that steaming tropical country.
Every PC volunteer I have ever met has been either a hopelessly naive liberal college kid or elderly Dim; or the type you've described.