X-네 마네 is a fixed pair meaning people are batting back and forth over whether X will happen or should be done — 마네 is the negative half, from 말다 'not do'. Every line here has it, usually followed by 하다 or 그러다: 사네 마네, 가네 마네 하고 있었는데, 15%를 올리네 마네 하고 있는데. It carries a note of impatience with the bickering itself, so it is not neutral reporting.