The idea is that in these financially straightened times, the tunnel/bridge would still make a decent profit – but not at the expense of keeping people waiting for hours. At present, this is a one-sided revenue raiser to the point of being abusive of the motorist and the environment.
The idea would save a fortune in lost productivity and stress, and be beneficial to the environment, ie reduced emissions. Revenue would be largely protected but the worst adverse consequences would be removed.