How long can they "incinerate"/operate as a nation if they have no oil/gas whatsoever? Our cost: every 2 weeks we drop a few bombs in a few locations, Their c

How long can they "incinerate"/operate as a nation if they have no oil/gas whatsoever? Our cost: every 2 weeks we drop a few bombs in a few locations, Their cost: no oil/gas and eventually no nothing as no one gets paid. Seems like a low-cost winning strategy to me.