Earlier quoted context omitted.
is it pointless to attempt democracy when so many democratic states are corrupt?
Not a good comparison because democratic states are consistently better than non-democratic ones, so we have evidence that democracy is an improvement compared to other methods.
Union wages are consistently higher than non-union wages, so we have evidence that unions are an improvement compared to direct relationships with employers.
Source: literally every long-term economic comparison of wages done for the last 50 years.