Twitter and Salesforce CEOs bicker over who is helping the homeless more

'How much have you given' Marc Benioff asked Jack Dorsey as the two sparred over proposed tax to assist those on the streets

The CEOs of two of the world's most prominent tech companies got into an online spat on Friday over who was doing the most to address homelessness.

The Salesforce CEO, Marc Benioff, and Twitter CEO, Jack Dorsey, were tweeting at each other about a proposed tax on high-earning San Francisco businesses. It would redirect millions of dollars to help thousands of people who live on the streets, including outside the headquarters of both companies.