Boy, did they ever reject it - 99 percent of the voting Writers Guild employees working for CBS in L.A., N.Y., Chicago and Washington. The offer was for a 12 percent wage increase over the next 45 months for TV and network radio employees and 8 percent for the folks in local radio. One obvious snag, as reported by THR: The 500 WGA members have been without a CBS contract since the last one expired 20 months ago. But contract terms would have been retroactive only three months, to September. No word on where the two sides go from here.