Earlier this month, lawyers for a group of black employees - and former employees - of Microsoft accused the software giant of employment practices they say "border on corporate slavery." The suit seeks $5 billion in damages. Attorneys representing employers say this is the latest example of a trend in bias cases — to constantly up the ante. Employers argue that the tactics are not only unfair to business, but may do more harm than good for diversity. NPR's David Molpus reports.