The Government are fully aware of the problem of the black economy and special measures have been taken, particularly in relation to the construction industry to counter this problem.
It is not possible to estimate the extent of black economy practices in any particular industry. However, given the extent of direct state involvement in building activity and the level of control exercised by the Revenue Commissioners and other areas of the State over the construction industry it is highly unlikely that a black economy of the size referred to by the Deputy exists.
In the first instance tax clearance procedures ensure that the vast bulk of construction work involving Government contracts and grants is made available only where the contractors concerned have an up-to-date tax record. The Revenue Commissioners operate a wide range of measures to ensure that tax obligations are met.
Regulations governing sub-contractors ensure that tax is deducated by principal contractors unless the sub-contractor has a satisfactory tax record. The procedure has been strengthened recently by new measures ensuring the identity of the sub-contractor where payments are to be made without deduction of tax.