In addition to the contributions required elsewhere in this chapter there shall be deducted from the salary or wages of each member covered by the provisions of this article, to finance the cost of the benefits provided herein, the sum of three dollars and fifty cents ($3.50) per month and an equivalent amount to be paid by the county as an additional county contribution. The amounts deducted pursuant to this section shall not be considered to be a portion of a member’s accumulated contributions and shall not be refunded to a member upon termination of service or for any other reason. The board is empowered to change the contribution figures set forth herein from time to

time based on actuarial recommendation as to contributions needed to fund these benefits.