The Australian Greens want to lift Australia out of its wages slump in the most straightforward way possible. They want to pay public servants more.

Greens treasury spokesman Peter Whish-Wilson has asked the Parliamentary Budget Office to lift public service public service wages by 4 per cent per annum.

Want to lift wages - start by paying public servants more, the Greens propose.

The increase would apply only to non-executive public servants below the classification executive level 1. It would run for five years. The extra funding given to departments to pay it would be exempt from the efficiency dividend.

The Parliamentary Budget Office costing, published on its website with permission from the Greens, puts the cost for the first three years at $963 million.