>>88284257In Hawaii, it costs like $100 to $300 to island hop. Here's the price for the more touristy season. Ferries would be around $100 for a one-way ticket each.
It helps that the majority of people live on Oahu in Hawaii, with Hawaii Island and Maui being the other two big population centers, with Kauai having about 80,000 people and the other islands all being 4views or lower.
Indonesia, though, they have a harsher issue. Java has over 1/2 of the nation's population, but that still leaves like 45% of the population scattered on all the other islands.