Amazon says it’s boosting pay for contracted drivers who deliver millions of packages to customers every day. The company announced at a conference for delivery firms this week that it will invest $440 million over the next year to increase pay rates for drivers. It did not disclose how much the bump will be, but said it expects U.S. drivers to earn an average of $20.50 per hour due to the investment. Many of Amazon’s delivery service partners, or DSPs, already pay well above that. The investment comes as the Teamsters ramp up their focus on the company's delivery workforce.