The agency compiles information from consumers, law-enforcement officials, the Better Business Bureau and other sources in a database called Consumer Sentinel, which now holds about 6.1 million complaints.

WSJ: Consumers Cry Foul Over Debt Collectors

However, he said there were "grey areas" in how the law was being interpreted and a single database was needed to give employers access to information about an individual's immigrant status, right to work and ability to claim benefits.

BBC: Minister 'hired illegal worker'

Payscale looked at 98 popular law schools and found roughly 28, 000 grads in their database who reported salary information including 8, 500 working in the private sector with less than five years of experience (we excluded those working in the public sector).

FORBES: Law School Graduates Do Not Make $160,000

Mr. SOBEL: Meaning that any odd piece of information, even if not arguably relevant to some legitimate law enforcement purpose, could find its way into this database.

NPR: Privacy Groups Sound Warning on Homeland Security Database

They looked at starting salaries of graduates from 98 popular law schools and found roughly 30, 000 of them in their database who had reported salary information, including 8, 900 working in the private sector with less than five years of experience (the study excluded those working in the public sector).

FORBES: The Law Schools Whose Grads Earn The Most