Most churches do not have the staff or resources to evaluate, train, fund and oversee the health, well-being and expansion of work in the nation where the missionary is serving.
Go To Nations is a para-church organization that comes alongside the local church to help them fulfill the Great Commission. There are some mega-churches that have the staff and resources to support a missionary fully. However, there is the danger of exclusivity if all of the work is derived in, from and through one church – a subliminal message that undermines the work of building a unified church in the nations.