it started last year Will, my local jobcenter went to a 3 day week to "help with customers more efficiently" acording to one of the advisors. so cutting will probably mean closing it fully.

Which job centre do you work at? A 3 three day week is unimaginable where I work, we even went to late night opening for a period so we were doing interviews until half past six....extremely unpopular with the customers as you can imagine, but it was a numbers game...
A lot of new staff were taken on for the recession, at one stage at one job centre in Wolverhampton there was a problem with too few desks for staff - you had around 70 people who didn't have a desk to call their own until more office space was found elsewhere in the city.
Benefits provision is an odd one though, the nature of making a supposedly standardised service universally accesible to all means you end up with some absolutely tiny offices with a handful of staff, and in large cities with high unemployment you end up with vast offices.
Like other people have posted though, welfare reform is bound to be on the agenda of the next government, and personally I would be in favour of it as well as cost cutting in the public sector. In its current form it is incredibly expensive, and some of the things that are allowed to happen are simply pouring government cash away for no good use.
A pet hate of mine that must cost millions nationally is what often happens with the young people I deal with who are claiming JSA - they chose to move out from their parents place (where they live rent free with no taxpayer subsidy) to a new place (deposit paid for by parents) and then promptly claim housing allowance and council tax benefit to keep them in their own flat.
This also makes it harder for them to be better off in work than on benefits - where as say, 20 hours per week at NMW, would be fine for them when living rent free with parents, it isn't enough for them to pay the rent/council tax by themselves and results in them being worse off than on benefits. The system should not allow things like this to happen in my view - if you want to move out from home, pay for it through work, don't take advantage of the state.