ivity , ▁to ▁force ▁employees ▁to ▁undert ake ▁point less ▁tasks , ▁and ▁to ▁make ▁the ▁entire ▁low - w age ▁work ▁experience ▁even ▁more ▁miser able . ▁ ▁Additionally , ▁she ▁describes ▁her ▁man agers ▁changing ▁her ▁shift ▁schedule ▁from ▁week ▁to ▁week ▁without ▁not ifying ▁her . ▁ ▁Ehren reich ▁describes ▁person ality ▁tests , ▁question na ires ▁designed ▁to ▁we ed ▁out ▁in compatible ▁potential ▁employees , ▁and ▁ur ine ▁drug ▁tests , ▁increasing ly ▁common ▁in ▁the ▁low ▁w age ▁market , ▁arg uing ▁that ▁they ▁d eter ▁potential ▁applic ants ▁and ▁viol ate ▁libert ies ▁while ▁having ▁little ▁tang ible ▁positive ▁effect ▁on ▁work ▁performance . ▁She ▁also ▁comments ▁that ▁she ▁bel ieves ▁they ▁are ▁a ▁way ▁for ▁an ▁employ er ▁to ▁relay ▁to ▁an ▁employee ▁what ▁is ▁expected ▁of ▁them ▁conduct ▁wise . ▁ ▁She ▁arg ues ▁that ▁' help ▁needed ' ▁signs ▁do ▁not ▁necessarily ▁indicate ▁a ▁job ▁opening ; ▁more ▁often ▁their ▁purpose ▁is ▁to ▁sust ain ▁a ▁pool ▁of ▁applic ants ▁in ▁fields ▁that ▁have ▁not orious ▁rapid ▁turn over ▁of ▁employees . ▁She ▁also ▁pos its ▁that ▁one ▁low - w age ▁job ▁is ▁often ▁not ▁enough ▁to ▁support ▁one ▁person ▁( let ▁alone ▁a ▁family ); ▁with ▁infl ating ▁housing ▁prices ▁and ▁st agn ant ▁w ages , ▁this ▁practice ▁increasing ly ▁becomes ▁difficult ▁to ▁maintain . ▁Many ▁of ▁the ▁workers ▁encountered ▁in ▁the ▁book ▁surv ive ▁by ▁living ▁with ▁relatives ▁or ▁other ▁persons ▁in ▁the ▁same ▁position , ▁or ▁even ▁in