EXAMPLE: In most all-inclusive package tours, about 80% of travellers' expenditures go to the airlines, hotels and other international companies, and not to local businesses or workers.
This is called leakage.
A study of tourism 'leakage' in Thailand estimated that 70% of all money spent by tourists ended up leaving Thailand
Estimates for other Third World countries range from 80% in the Caribbean to 40% in India.