I am not going to argue against a half wage pay cut being a huge adjustment, there is no doubt whatsoever that it would. For darn near anyone.
My take on it, ONLY from the info that the OP gave, is that he is still in the top fifth (at least top two fifths) of wage earners in the United States at 80 grand. Would he be able to live a lifestyle equal to what he had? Of course not.
However, with some proper financial planning before hand, and some cuts (perhaps rather large ones) after, $80,000 (coupled with any savings that he "should" have) is more than sufficient to keep food on the table and power on for a family of 5.
That is what boggles my mind about the situation. And my opinion is not to bash him in any way, it is just that. An opinion. One that could very well change if other factors were obvious (such as health problems, caring for extended family, ect..). From what we have though, that is not mentioned.
NickG posted this at Sonic, and saddly, the reverse of what he did describes a large number of people in the US in his position. Does it describe the OP? Can not say for sure, but Nick makes a great point IMHO.
Look I understand it living it up....Right before my wife got pregnant I was looking at the new Audi R8. However, I was in a position where my current auto was paid for and the only real debt I had was a mortgage. It was the first time in my life that I could truly say I had made it from where I came from and I wanted a status symbol to show it....
Trust me I get it...
I was all ready to slap the ink on the paper and put my order in for a $100K+ car...Then my wife told me she was pregnant....Then all of a sudden it was even more stupid to drop that kind of money on a car, especially one that you can't even put a car seat in....So I traded my old F150 in on a brand new one, and bought my wife the SUV she wanted and still came out way cheaper. Anyway..the point is you have to decide what's more important...Keeping up with the Jones' or being able to pay for Harvard if that's where your son wants to go. Do I still want the R8? Sure I do, but not enough to threaten the future of my son or my retire by the age of 50 plan.
It's called responsibility and triage...What's more important now and in the future...Alot of people can't see past the 65" Plasma and Blu-Ray they just put on the 15th credit card they just got approved for...Because the others are maxed out.