From the link in the OP:
" The self-described socialist candidate said junior field organizers earn roughly $36,000 per year in salary, with employer-paid health care and sick leave. But he acknowledged that their salary can effectively dip below $15 per hour if staffers work much more than 40 hours per week, which is common on presidential campaigns.
The solution is to "limit the number of hours staffers work to 42 or 43 each week to ensure they’re making the equivalent of $15 an hour," he told the Register's Brianne Pfannenstiel."
The linked article also says those employees are unionized. What kind of union allows it's employees to work overtime without getting paid for it?
I can see what's coming, employees will clock out when their hours worked hits 40, and then go back to work. Or get fired if they don't.