Any increase in pension payment received by any person under the provisions of this act shall be deemed cost-of-living increases, and shall not be construed as a permanent and binding obligation of the pension fund which will, in perpetuity, entitle present and future pensioners to secure pensions predicated upon such increases. Such increased pensions shall be subject to revision by the General Assembly in the event of a decline or a rise in the cost of living. In no event shall any decrease in living costs result in decreasing the pension payments in effect prior to the passage of this act.
53 P.S. § 30498