Tax credits - I'd phase out over 2 years but would make the NMW £7.50 per hour for 18-24 year olds and £8.00 for 25+. The NMW for 16-18 year olds I'd raise to £6.50 an hour.
Child Benefit would be for the first two children only and would only be payable until age 16. I'd bring this in from April 2016. Anyone already receiving it for more than 2 children I would reduce it each year by £5 per child until it was no longer payable. CB would not be paid to any child outside the UK.
FSM would be means tested.
I would've tolerate tax avoidance and would be harshly clamping down on those companies that do.
I'd have a maximum cap on housing benefit which would differ region to region. I'd also cap the rent that rogue landlords charge. I'd set a limit on what they could charge depending on accommodation from region to region. Talking of landlords, I'd bring in much stricter rules that landlords must adhere to re repairs and what is deemed suitable accommodation.
I'd means test winter fuel allowance and free bus travel.
I'd abolish the bedroom tax and bring in legally enforceable letting agreements for social housing stating that when houses are under occupied the tenant must move.
I'd cap MP's expenses and drastically cut local Councillors wages, afterall, most of them have other employment anyway.