It should be, and on 'Blue Monday', a couple of the party leaders are highlighting it:
Nick Clegg is backing a pilot scheme in the NHS, based on results in the US, to reduce the number of suicides by providing better response and support.
Ed Miliband is focusing on child mental health, having had his own taskforce looking into this over the last 2-3 years, with a report launched today. I notice that the report on this says this will be funded by 'increasing the proportion' of mental health spending which goes on children. I.e. reducing the proportion spent on adults. The whole mental health budget needs to rise.
This is good, there may not be many votes in depression, but we don't want politicians who are hunting votes, we want politicians who identify the major issues our country faces which governments can address, and this is one of them.