Nicola Willis is looking to further rein in Government spending in next month's Budget - but one expert has warned it won't go far enough.

The Finance Minister is slashing the operating allowance from $2.4 billion to $1.3 billion.

She's targeting a return to surplus in 2029.

NZ Initiative economist Eric Crampton says Government spending has been running too high for years - and cuts need to be made to save the situation.

LISTEN ABOVE