Yes the Chinese do exactly that- prebuild suppl of electricity which then triggers the building of demand- factories and cities- electricity is the lifeblood of the modern economy and the Chinese model of build the supply and the demand will come has proven hugely successful. And yes it is a model that private operators will not adopt because of the risk and the longer term investment- it is a model that only a government can have the mandate and incentive to operate. Private models much more incentivise limited new power generation so they can milk the maximum profits from the limited supply provided by the generators they already own and operate.