The plan shall not be deemed to constitute a contract between the county and any member or to be a consideration or an inducement for the employment of any member or employee. Nothing contained in the plan shall be deemed to give any member or employee the right to be retained in the service of the county or to interfere with the right of the county to discharge any member or employee at any time regardless of the effect which such discharge shall have upon the employee as a member of this plan. No provisions herein shall be construed to bestow upon any member or any other person any vested right to benefits, return of employee contributions, or any other valuable interest hereunder. No implied contract for benefits shall be held to arise hereunder, either before or after retirement.