Labour's Shadow Energy and Climate Change Secretary, Caroline Flint, says customers will not understand how energy companies can get away with inflation-busting price rises when their profits are already increasing. She said:
"In the wake of the allegations this week about price fixing in the electricity and gas markets, the time has come for a complete overhaul of our energy market.
"We need a One Nation government to break the dominance of the energy giants, open up the energy market, protect vulnerable customers from being ripped off and create a tough new energy regulator with the power to force energy companies to pass on savings to consumers."
More top news
The former prime minister made the comments as he prepares to return to politics saying he wants to be "part of the debate" on Brexit.
The new measures would mirror childcare vouchers and see workers sacrifice some of their salary to benefit.
Google, Facebook and Twitter could face multi-million pound fines over their failure to remove illegal content, MPs say.