This is certainly true in theory.
In practise, there are a number of unscrupulous employers and agencies who deliberately hire workers with a poor grasp of English so that they can exploit them, paying them less than the minimum, or even charge them for work. These are usually big (multi-)national companies, e.g. Dominos.

Personally I'd prefer tigher auditing and tougher penalties, but like any other prohibitive law, it would still be circumvented; some poor bastards with no crime other than some dodgy book-keeping would get whacked with the full punishment while the real criminals would still flout the law with bare-faced cheek, because they can afford to hire the best lawyers.
( The Mock TurtIe ™ --- Thinks you are a cunt, on, Wed 27 May 2009, 18:53, archived)

Yeah someone will always break the rules
even if it was the BNP who had made the rules.

Anyway I reckon it's all the immigrants leaving that's crashed our economy in the first place.
( Moon Girl Technologies horrendous beanbag, Wed 27 May 2009, 18:56, archived)