The self-invented genre Mr. Ferrer calls chaguisa draws on old rural Cuban styles and music from across Latin America , and the songs merge the naturalness of folk tunes with lyrics full of ideas , from a song that chides selfish husbands to one that sympathizes with an Andean cocaine grower but could also be a veiled protest about conditions in Cuba : '' How will I live , '' he sings , '' if my money is worthless ? ''