We have to be very careful about making generalizations on such culturally contested issues, especially when we often tend to judge 'other' cultures from the values and norms that are prescribed to and inculuturated on us as the "right ways." The reporter is obviously an example of it. Nancy Levine, a cultural anthropologist, deals with this specific group in question in great details on her book below: http://www.epinions.com/content_74186919556
She also talks about the factors causing the decline in this particular marriage practice in: Levine, Nancy E. and Joan B. Silk (1997) Why polyandry fails: sources of instability in polyandrous marriages. Current Anthropology 38:375-398. Unlike many other cultural pratices in Nepal, in this ethnic group, women's status--both strategic interest and pratical needs, is relatively higher within the household and society in terms of their decision-making power.