He said there had been many cases in which private contractors either drove up the costs to the government or failed to do the job well.

On occasion, however, a general contractor will fail to make those payments.

The department's contractors are "failing to adequately protect workers, the public and the environment," the report says.

"If any contractor is failing to perform as we have intended, we will take appropriate action."

If the contractor fails to comply, the state can cancel the contract.

As for whether the contractors failed to warn the government of potential dangers, he said, the situation may well be the other way around.

Among them is being able to afford bonding insurance to protect customers if the contractor fails to complete the work.

The first contractor had failed to show, and when I called after waiting for three days his phone had been disconnected.

For example, what happens if the contractor fails to complete the works by an agreed date: who accepts the risk of delays to the work?

Deadlines were missed and the contractors failed to deliver the required quality of products.