Labour spent months and months criticising the "Tory Tax Burden". That's the problem, they criticised everything and it will be very difficult for them to change anything without at least being hypocrites about it.
Well they have to criticise, they are in opposition
But now in government I would give it a few years then tell it as it is and spend
It might lead to the usual tory moans but with the majority labour have I say go for it