Uber, the ride-sharing service that is putting cabbies out of business while reinventing transportation, has spent much of the past year under siege from workers, advocates and the media as America’s new sweatshop.

Drivers, who are considered small businesses, complain that they work long hours for little pay. They say Uber holds too much control over them, so they deserve the same employee protections as everyone else – minimum wage, overtime pay and health benefits.

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After reviewing USA TODAY’s findings, Stanford Law School professor William Gould said port trucking is a new low for American workers.

Gould is one of the nation’s top labor experts and a former chairman of the National Labor Relations Board.