The Preamble of the Immigration Act, 2002 (Act No. 13 of 2002) (“the Immigration Act”) states that in providing for the regulation of admission of foreigners to, their residence in, and their departure from the Republic and for matters connected therewith, the Department of Home Affairs must ensure that the South African economy has access at all times to the full measure of needed contributions by foreigners and that the contribution of foreigners in the South African labour market does not adversely impact on existing labour standards and the rights and expectations of South African workers.