Part of the problem is competing against a conference full of teams that take football very damn seriously. Even KU is dedicated to picking up the slack now.
Compare that to the other conferences where you can always count on a few cupcakes because football at those schools is still a bit of an afterthought:
SEC: Vanderbilt, Kentucky, Mississippi State, Missouri
B1G: Minnesota, Illinois, Indiana, Rutgers, Purdue, Maryland
ACC: Boston College, Syracuse, Virginia, Duke, North Carolina, NC State, Georgia Tech, Wake Forest
PAC: Oregon State, Cal, Washington State, Arizona