Low-cost carriers may have begun to dominate Indian skies, but it seems that international travel might be a tougher nut to crack. On one Singapore-bound flight of a major Indian low-cost airline, hungry passengers complained bitterly that the airline expected to be paid for its sandwiches in Singaporean dollars. The air hostess on duty was not impressed by their pleas; she had problems of her own, she explained. For one thing, there was so little food on the plane that she was forced to sell her own lunch to starving passengers.