It’s about all of those union contracts tied to the minimum wage and the big boost in Democrat contributions that would follow. Whether marginal people can actually get $22/hour jobs or find no work and end up in an expanded social welfare system is of no consequence to Steyer and the other master manipulators.
Bumping minimum wage pressures (directly or indirectly) a rise in other wages. Union wages are often explicitly tied to minwage; increase burger-flipper’s wage 3x and assembly line guys will see theirs rise by whatever the contract’s math says (either +$14.75 or x3).