[A]t a…construction-materials yard in [a] Moscow suburb…[Tajik] ironworker Abdumalik Kholikov eats and sleeps in a trailer smaller than a prison cell…There's no toilet and no shower…Kholikov and legions of immigrants like him from Central Asia's dirt-poor economies are much of the brawn behind Moscow's…building boom…They're also Russia's untouchables…and are routinely exploited by corrupt police and unscrupulous employers… Construction companies routinely renege on paying wages to Central Asian migrant laborers. The housing they provide workers at job sites amounts to little more than ramshackle one-room cabins…By using illegal workers, employers can avoid paying taxes, hold back wages whenever they want and impose 12- or even 14-hour workdays.