These are Saudi Arabia, Kuwait, UAE, Qatar, Brunei, Oman, Libya. These countries have very high per capita incomes, a positive balance of payments, and external investment.
They are distinguished by the low level of development of productive forces: more recently, the majority of the population of these countries was engaged in nomadic cattle breeding and marine fishing; they were among the poorest countries in the world. However, after the discovery of large oil fields in the 50-60s (at the beginning they did not give profits, they were developed by foreign companies) and the formation of OPEC (Organization of Petroleum Exporting Countries), it was possible to start receiving monopoly rents due to an increase in oil prices on the world market.
Unusually high oil revenues in the monarchies of the Persian Gulf and Brunei, combined with a meager population, are the main phenomenological circumstance for this subgroup of countries. The national assimilation of oil revenues has taken the path of massive consumer imports. A typical feature of the economies of these countries is: the lowest employment rate in the world; the highest is non-working; the consumer nature of the economy; high dependence on the global oil market; and scientific and technological dependence on developed countries.
The monarchies of the Persian Gulf are currently experiencing a construction boom, international airports, highways have appeared in the deserts, and large-scale housing construction is underway.
The countries of the subgroup are characterized by a combination of economic prosperity with extreme backwardness, which is manifested in high child mortality, the dominance of traditional clan-tribal law, and the oppressed position of women.