Any assignment, pledge, or encumbrance of any right to benefits that are or may become due or payable under this title is void. Such rights to benefits are exempt from levy, execution, attachment, or any other remedy whatsoever provided for the collection of debts, except as provided in RCW 50A.15.080. Benefits received by any employee, so long as they are not commingled with other funds of the recipient, are exempt from any remedy whatsoever for collection of all debts except debts incurred for necessaries furnished to such employee or the employee's spouse or dependents during the time when such individual was receiving family or medical leave. Any waiver of any exemption provided for in this section is void.