Miners appear to be holding off on Segwit support because of concerns of the block size staying at 1MB indefinitely. Is this a legitimate concern?

From what I can tell their reasoning is that if bitcoin is kept at 1MB block limits then their incentive/reward would be greatly diminished or suppressed. On the surface this makes sense, am I missing something here? via /r/Bitcoin http://bit.ly/2gDpT6M