That is beside the point. The point is that they are using a loophole in the asylum process to stay illegally for more time than they're allowed. After they successfully do that, they of course have to work illegally (endangering themselves and others), they don't (can't) pay taxes, and they end up sending all the money they earned abroad. All attempts to close this loophole by various governments have been unfruitful, mainly because of strenuous left-wing opposition: Italian government tried to fingerprint them years ago (in order to make them more easily identifiable) but the law was killed. British government tried to move them in other (third world) countries during the asylum process (to make escaping their accommodation less appealing) but they couldn't do that. Now they're trying to shorten the asylum decision waiting window (which is ~1 year iirc), but that again is something that will be appealed to death.

Instantly fixable by letting people work legally.