People have lost their survival skills

Thats right.
People can no longer survive in the "real world". Part of the reason is that a "real world" doesn't feature as prominantly in peoples lives as it once did. Indeed, for many, a "real world" doesn't even exist. Everything is packaged in bubble wrap and synthetic cotton wool so as to prevent breakage and disturbances.
It happens from birth. There has been thousands spent on advertising a vaccine for childhood chicken pox. Chicken pox and the subsequent scars have been part of every childs childhood for hundreds of years.
Then these children go on to school, where their individual needs are fulfilled with the utmost attention. Utmost attention more often than not comes in the form of pills to treat ADD, ADHD, ADHT, AFDFDFHDFHFTHSRT, which, not in a too distant past, was known as 'little shit acting up' syndrome.
No longer allowed to discipline children with the hand, instead we 'treat' them kindly by giving them mind-altering brain-chemical changing drugs. God forbid they should feel pain.
These children grow into young adults, who have trouble with their motor skills, not because of their low carb high ritelin diet as children, but due to one hand being firmly attached to the ear via a mobile phone and the other holding on to a paper or styrofome cup full of coffee.
Two items of importance 99% of people say they can't live without for a single day.
Want a job young adults?
Here, have one on a platter.
A platter served by you parents' church buddy, or, more commonly, a voting national audience for a highly rating television show.
We wouldn't you to work hard and get a job on your own accord.
And you know what? We'll through in for you a fucking ipod for the sake of it.
Congratulations, now you have a job with a fancy name and fuck all to do.
Perhaps you can go to the gym during your lunch hour so you can show off all those great new active wear outfits one cannot live without.
You're now getting on in life, but of course the second half of your prescribed century is still considered "young". Its how you feel that determines your age, not how many birthday celebrations come round.
After such a tough life, looks like you'll need to have a little "you" time, be a bit selfish, do those things you always wanted.
Like take up 85% of the medical resources available. Short of breath? We'll spend millions rectifying the problem, instead of coming to the conclusion of: you're old.

Honestly, I don't know what people are going to do if something happened which changed life as they know it. If some disaster came and wiped everything out.

What I do know is that when it happens, there will be a television show broadcasting it, even if there are no televisions upon which it could be semi-conciously watched.