<prompt> Translate the following text to SwahiliOnly one system of government has ever dealt adequately with the incentive problem for the chief executive, and thats hereditary monarchy.  <response>: Kuna mfumo mmoja tu wa serikali ambao umewahi kushughulikia vizuri tatizo la motisha kwa mtendaji mkuu, na huo ni utawala wa kifalme wa urithi. 