Generally considered a good place to work that treats employees well, Starbucks (NASDAQ: SBUX) has faced recent backlash from some of its baristas over staffing levels in stores. Though employee discontent at Starbucks has been more of a quiet undercurrent than a full-on staff outburst, it can undermine the chain’s business model. Even as it has added technology to assist with order taking and payment, Starbucks still has a barista-driven business.