Saudi Arabia is holding a large area, Qatar is just 0.53% of Saudi Arabia in terms of Area, So more area mean more chances of resources, minerals, Oil reservoirs,
Qatar need Saudi Arab badly, cuz this the only side through which Qatar is connected to the world by road, and it will be until the make the causeway to Bahrain, but still what? they will be just go to Bahrain, cuz Bahrain is in the same position as Qatar is.. or there another plan to connect to UAE via Causeway.. but again same situation.. and all there raw material for industries are coming from Saudi Arabia..

but Saudi Arab need just a good & Obedient neighbor, that's all...