This piece shows very clearly the limits to deregulation in the case of energy markets. Jamie's oped was published in Project Syndicate, and a slightly different version is available here at INET, in which we find out that radical free market policies ended up in what he termed 'selective socialism.' The relevant paragraph:
the price mechanism failed completely. Wholesale prices rose a hundred-fold – but retail prices, under contract, did not, except for the unlucky customers of Griddy, who got socked with bills for thousands of dollars each day. ERCOT was therefore forced to cut power, which might have been tolerable, had it happened on a rolling basis across neighborhoods throughout the state. But this was impossible: you can’t cut power to hospitals, fire stations, and other critical facilities, or for that matter to high-rise downtown apartments reliant on elevators. So lights stayed on in some areas, and they stayed off – for days on end – in others. Selective socialism, one might call it.
There is a short video here too.