The Government's plan to guarantee billions of pounds of new mortgages could lead to a new house price bubble, some economists are warning.
And independent analysts claim tax rises or deeper spending cuts could follow the next election as the Government struggles to slash the budget deficit.
Watch Business Editor Laura Kuenssberg's report:
George Osborne faces criticism that his mortgage guarantee plan might actually make houses less affordable.
The Treasury has still not explicitly said it will prevent homeowners from using taxpayer-backed Mortgage Guarantees to buy second homes.
It opens up the possibility of buying a house to millions who don't have a deposit but they might have to pay more for the privilege.