People working in restaurants, bars and hotels who make your trip pleasant by cooking, making your beds etc. all earn paltry wages. You cannot put an end to the general poverty on the islands, but you can certainly ensure that your staff gets a reasonable tip to supplement their meagre wage. For your bus driver and possible second driver, a tip of 50 cents per day for each of them (per traveller) is a good guideline. For this sort of tip, it is useful to pass around a collection box (consult with your tour guide first). This pot can also be used to buy small snacks for the group during the journeys. The local English-speaking tour guides will also expect a tip for their services, assuming they have performed their duties in a satisfactory manner. Our guideline is around € 1 per person per day. Naturally, you may give more if you wish.