The point missed from this thread is that if we do not control the deficit now then we will have to pay a higher rate of interest on the money borrowed.
The government is proposing to reduce the deficit over 5 years, not to cut it over night. That actually means that net debt will increase each year. However, the rate of interest the UK is paying on government debt is about 3% whereas Ireland is paying about 5% (and Germany about 2.5%).
If we followed Labour's strategy of cutting later then we would have to pay more interest and cut spending by more.
2% extra on £1,000,000,000,000 of debt is £20,000,000,000 extra each year. (20bn)
Hence if anyone wishes to argue that we should not be cutting now they have to explain where we will get the extra 20bn from in the future (either extra cuts or extra tax).
VAT on the basis of households is a marginally progressive tax. A childless couple on Income support is likely to pay an extra 50p per week, but once their benefits are uprated they will be about £1 a week better off.
The point about index linked benefits is that they are linked to the cost of living (including VAT).