Keith Rabois, cofounder and new chairman at Opendoor Technologies, says the company is so "bloated" it could cut the vast majority of its workforce. Rabois, whose return to the company's board of directors was announced Thursday, outlined several changes that are needed at Opendoor in an interview with CNBC's "Squawk on the Street" on Friday."There's 1,400 employees at Opendoor. I don't know what most of them do. We don't need more than 200 of them," Rabois said, adding, "the company is completely bloated. ...