David Cameron has accused Labour of delivering a "price con" to voters by promising to freeze energy prices for two years should the Opposition win the next general election.
But Labour leader Ed Miliband hit back at the Prime Minister as he insisted people were being driven to food banks as living standards continue to fall under the coalition Government.
Mr Cameron suggested today's figures suggesting one million more people are in work under the Government's proposals provided one million reasons for people to shun a future Labour administration.
Yet in reference to an apparent environmental U-turn from the Prime Minister, Mr Miliband claimed Mr Cameron should feel faintly embarrassed he had gone from "hug a husky to gas a badger" in the last five years.
During Prime Minister's Questions, Mr Miliband pressed Mr Cameron on whether he believed energy company SSE was justified in increasing bills by 8.2%.
He sai d the firm had a "dividend obsession" and it was "make up your mind time" for the Prime Minister on whether he supported the energy companies or the consumer.
Mr Miliband suggested Mr Cameron did not want to talk about energy prices as he had "no answer".
He continued: "Can you confirm that, opposing the freeze, you have on your side the 'big six' energy companies and supporting a freeze we have consumer bodies like Which? and small energy producers... and the vast majority of the British people?"
Mr Cameron insisted the Government's measures to cut income tax and freeze council tax lifted two million people out of tax and proved they were on the side of hard-working people.
On Labour's energy price freeze policy, Mr Cameron said to Mr Miliband: "If an energy price freeze was such a great idea, why didn't you introduce it when you stood at this dispatch box as energy secretary?
"The fact is, it is not a price freeze, it is a price con. You are not in control of worldwide gas prices, which is why you had to admit the next day you couldn't keep your promise. That is the truth."
Mr Cameron said the Labour leader did not want to talk about the economy because he does not have a "credible economic policy".
He told Mr Miliband: "He can't explain why the deficit is falling, the economy is growing, unemployment is coming down.
"Given your problem is no credible economic policy, you don't help yourself by having a totally incredible energy policy."
Picking up Mr Cameron on his previous talk on the environment, Mr Miliband said to the Prime Minister: "Who was it who said 'Vote blue, go green'? I think it was you.
"Who was it who said as leader of the opposition 'I think green taxes as a whole need to go up'? It was you.
"And you have been talking about my record as energy secretary. So I looked back on the record of the Energy Bill from 2010. Did you oppose the Energy Bill of 2010? No, he supported the Energy Bill of 2010.
"You could say two parties working together in the national interest.
"Let me ask you, do you feel faintly embarrassed that in five short years you've gone from hug a husky to gas a badger?"
Mr Cameron replied: "The only embarrassing thing is this tortured performance."
Turning to the last Labour government's record, the PM told the Opposition leader: "Let me remind you on the cost of living, they (Labour) doubled the council tax, they doubled gas bills, they put up electricity bills by half, they put up petrol tax 12 times and they increased the basic state pension by a measly 75p.
"And then when it came to the low-paid they got rid of the 10p income tax band altogether. They have absolutely no economic policy."
Mr Cameron said this was why Labour former chancellor Alistair Darling said last month that he was waiting to hear the Opposition's views on the economy.
The PM added: "Well, we've all been waiting but I think we should give up waiting because they are a hopeless Opposition."
Mr Miliband dismissed the Tory leader's talk, adding repeatedly: "I'll tell you what happened."
He said living standards went up £3,700 over the 13 years of the last Labour government compared to a drop of £1,500 under Mr Cameron.
Mr Miliband told Mr Cameron: "And this is the reality of Britain under you. Food bank use on the rise, energy bills soaring, even if you are in work you are worse off and a Prime Minister in total denial about the cost of living crisis facing millions of families."
The PM replied: "If you want to debate the last Labour government, I say 'bring it on'.
"They bankrupted this country.
"And I have to say to you, on the day we can see there are one million more people in work in our country, that is one million reasons to stick to the economic plan that we have, it is one million reasons to keep on getting the deficit down, delivering on education, delivering on welfare.
"And it's one million reasons to say more borrowing, more spending, more debt - that is the same old Labour, never again."