Google this: How can paying people for digging a hole and filling it up again help the economy?
At best, it is a band-aid to cover the problem.
It doesn't itself grow the economy, but it can temporarily stop the blood flow.
A economy requires the creation of services and products. Without that, there is no growth.
So you can cover the wound but you are not really healing it.
In the end you are going to have to keep supplying bandages.
Bandages aren't free though. Someone has to make the bandage, someone has to supply the materials. So really you are subtracting from the economy. The only way you can really grow the economy, heal the wound, is by the creation of products and services that support the production of product.
Hopefully a government can do more than just supply bandages. Otherwise they are just hiding the blood and hoping folks will think everything is ok.
Also, why make them "dig holes and fill them"? Why not just give them the money?