Proposition C is a ballot measure in San Francisco that would tax the city's largest corporations to provide relief in the city's ongoing homelessness crisis. San Francisco's biggest tech employer, Salesforce, and its CEO, Marc Benioff, have been the biggest advocates in favor of Prop C.  The city's second largest tech employer, Uber, has been nowhere to be found in the debate. A company spokesperson told Business Insider on Monday that "Uber remains neutral on Prop C with no plans to engage." San Francisco's biggest tech employer, Salesforce, is not mincing words when it comes to the city's homelessness crisis.