casual labour: workers not on permanent
jobs
gangmasters: here - seasonal employment
agencies
recruit: get people to work for
someone
cramped: not big enough for the number of people in them
cheat the Treasury out of huge sums of tax: by acting dishonestly,
cause the Treasury (the government department that controls public
money) to receive much less tax money
launched: started
the scale of the problem: how big the problem is
cut corners: do something quickly but less thoroughly than
you should
stick to the law: act in a legal
manner, not break the law