Ukwehliswa kwezinkampani zemikhumbi kumthamo wokuthumela kuyasebenza
Abathumeli bempahla abaningi bathi nakuba kunemizila eminingi enamandla agcwele, lokhu kuyisizathu sokuthi kungani izinkampani zama-liner zehlise umthamo wazo wemikhumbi. "Izinkampani zakwa-Liner zinethemba lokukhuphula izinga lezimpahla zonyaka ozayo (inhlangano yesikhathi eside), ngakho zinciphisa umthamo wokuthutha futhi zikhuphule amanani ezimpahla ekupheleni konyaka."
Umthumeli wezimpahla uqhube wathi ngenxa yokuthi ukuqhuma kwenziwa ngokungemthetho, bekungelona ukwenyuka kwangempela komthamo wempahla. Ngokuqondene nezinga lamanje lokuqhuma, umthumeli wempahla wembula, “Kungaphezudlwana nje kokujwayelekile, akukuningi kakhulu.