Lack of roster depth. They used to have 5-10 guys on the roster at all times who were just there to job, and many more local guys they would use at times. Now they don't. If someone doesn't have "use", they don't get to stay.
Examining 1991:
Full Time Jobbers
Kato - 156 matches, 11 wins (2-51 singles)
Pat Tanaka - 113 matches, 12 wins (1-11 singles)
(Most of those tag wins for each man were early in the year when Orient Express were still recieving a semblence of a push)
Brooklyn Brawler - 96 matches, 5 wins (4-81 singles)
Dale Wolfe - 30 matches, 0 wins (0-21 singles)
Bob Bradley - 28 matches, 1 win (0-22 singles)
Other guys like Louie Spicolli, Barry Hardy & Duane Gill (jobber team!), plus "pushed" jobbers who hardly ever won (but won more than these other guys) like Koko B Ware, Bushwhackers (48-107 as a team), Hercules & Paul Roma (18-55 as a team), Haku, The Genious, etc, littered the roster.