Federal Labor says the new laws introduced in the last few months by the Howard's government are already resulting in guest workers being exploited.
His comments follow unions' calls on the federal government to investigate a Perth builder after he told media he imports labour because they're more obedient and don't get as bored as Australians.
Hanssen Industries manager Dick Smith has told the ABC he only has to pay guest workers 40-thousand dollars a year and he can send them home if he's unhappy with them.
Labor's immigration spokesman Tony Burke, has told the ABC he expects the number of similar cases to rise.
"The government has increased the skilled migration intake, increased the use of temporary visas, and made this sort of changes to industrial relation laws".
All this was going to happen," he has added. "I just respect that the employers are so brave and so open about it".