global watchdog said the state will continue to spend more on public services and other areas such as welfare and overseas aid than it raises in tax throughout the next parliament .
the projection underlines just how hard it will be for the next government to eliminate the country 's annual deficit , which hit a record £ 153billion under labour in 2009-10 and now stands at £ 90billion .
the conservatives have pledged to return britain to the black in 2018-19 with a surplus of £ 5.2 billion .