Problems are piling up for Thailand's once booming economy and decision-makers need to rise to the occasion, says Daniel Moss for Bloomberg Opinion.  SINGAPORE: Thailand’s economy, one of Asia’s brightest stars over a generation ago, has congestion issues. Problems are piling up with very poor timing, made worse by the strains on global business from the Iran war. Decision-makers, already beset by disappointing growth, enormous demographic challenges and a tourism industry that’s come down to