This argument makes no sense to me , your assuming my portfolio hasn't grown at all and even if it lost 20% i'd rather have 80% of something than 100% of nothing. I can't access my pension till retirement .
What if you found out a kid was really sick and needed to go to America to fund treatment? What use is 200k in a pension to me then? I'd much rather instant access to 80% of that money , it's hard to put a value on the instant access to that money , you have put a value on it and to you pension investment is worth it , to me its not , not having access to that amount of money until retirement I would need to be compensated a lot more.
And if they tax pensions what can you do other than sit there and take it , I can move my money out of my investments I might decide to buy a place abroad , cash up and leave the country altogether or anything else I chose to do , again this non financial value is huge to me.
And equally I think investing in something that you don't get back for 30+ years in my case is crazy when I strongly believe the government are going to raid pension funds in the future.
This is a not a straight forward right or wrong decision its a personal judgement call based on all the facts available , I think locking money away is crazy based on what I have said about not been able to put a value on having access to money when you need it for whatever or moving it to be avoid penal taxes or an opportunity that may arise , maybe i'll buy a place abroad with my money and retire at 50 to spain , you cannot put a value on that , the fact the government has shown capacity to raid private pensions in the past I think people that invest are extremely naive to believe they won't be again and paying for the people that were'nt so prudent in their planning.