Nothing contained in this chapter shall in any way limit or prohibit the payment of wages or compensation at more frequent intervals, or in greater amounts or in full when or before due, but no provision of this chapter can in any way be contravened or set aside by a private agreement; provided, that no agreement contained in a written contract relating to the payment of any bonus in addition to the payment of wages shall be subject to the provisions of this chapter.
R.I. Gen. Laws § 28-14-9