The council said the "controversial" system had "wreaked havoc" throughout the travel industry and should be replaced if there was to be any hope of saving "hundreds of thousands" of travel and tourism jobs in the UK.
It also warned that the UK could lose out on crucial funding, investment and spending if the government did not provide sufficient support for the sector.
The WTTC has also called on the G7, leaders of which will meet in Cornwall this week (11-13 June), to play a "critical role" in driving change to "save the global travel and tourism sector".
