Except as provided in this chapter, no member or employee of the public employees retirement board shall have any interest direct or indirect in the gains or profits of any investment made by the board nor as such directly or indirectly receive any pay or emolument of the member’s or employee’s services. No member or person connected with the board directly or indirectly, for self or as an agent or partner of others, shall borrow any of its funds or deposits or in any manner use the same except to make such current and necessary payments as are authorized by the board. No member or employee shall become an indorser or surety or become in any manner an obligor for moneys loaned by or borrowed from the board.