Yep, this is just basic Keynesian economics page one, chapter one.
Use Government money to stimulate demand through an increased public works programme. Build that new hospital, school road and, in the process create jobs for the workers employed directly and for those in industries supplying related goods and services. Their wages flow into increased demand for other goods and services and keep other industries ticking along. They also provide the government with a bit more tax to pour into more public works.
The weakness in this strategy is that, when things overheat, the Government has to back off but their bloated bureaucracy makes this difficult - Keynes never allowed for "Big Government", certainly not on the scale we have in this country. Still, the accellerator is what we need now, the brakes can wait.
By any measure another "cash splash" is economic stupidity. It will benefit Coles, Meyer and the other retailers but only in the short term and it will save the Banks chasing up a few dodgy debts but once the cash is spent the Government's cupboard will be as bare as Mother hubbard's and we will have zilch to show for it. Far better to put it into public works and at least have something concrete to show for it afterwards.
Snag is that the useless Greens and their blind idealogical hatred of the Libs will probably ensure that the Government's package gets through with a few "greenie sweeteners" added.