I spent many years in Third World development. It is common for Third World societies to strongly resist any change to their traditional norms. Unfortunately that is not possible in the contemporary world.
Bhutan, Burma and a few other countries try an approach of allowing only limited tourism. That approach seldom works because tourists are very demanding for their own non-traditional goods and often carry off the population in marriage.
I saw a better approach in Laos where a large international airport in the capitol was surrounded by factories which in turn was surrounded by a very high fence. Semi-finished goods were flown in, to be finished by Lao workers, and flown out for the world market.
The Lao people were not expose to modern lifestyles, but they earned good wages to use in their traditional markets.
It seems like a good model of development to me.