I think the gap in life expectancy and the wage gap are totally different animals. The wage gap being a myth, and the life expectancy gap being very real.
In the not so distant past (somewhere in the 1800's? Somebody who is better informed can correct me, sorry), women had lower life expectancies than men. This was true of most of recorded history, due to childbirth. It's just a fact. It's a messy business, and when one goes through that 8, 10, 15 times.... well, one of 'em is likely to get you through infection or some other complication, when you've got primitive health care. Modern medicine has easily solved that problem.
That said, the modern gap in life expectancy is another deal, and needs to be considered separately. Take away the child birth factor, and the risks to men's mortality come into sharper focus. War, hazardous jobs, suicide, etc. But even when you factor those in, there's still a discrepancy.
I don't think we fully understand this. And it concerns me greatly on a personal level, obviously. As with most complex human tendencies, there are probably a number of factors at work. Hormones must be key, lifestyle, what?
?
We have made some strides in recent years I think in getting men to take better care of themselves. Men are much more comfortable today seeking routine preventive care for example. We're doing better, I think, but men are still very much second class citizens in the medical research community, and that needs to change.
How to accomplish this, I don't know. I often feel this way around here... You know.... This sucks, and what can we do about it. Not much. Well, that sucks too.