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Additionally, those pensions will only be there if the markets do not crash. Belgium, had pension funds before WW2. But the Great Crash vaporized those funds, and their contributors' pensions. After the war, the workers' movement pushed for a PAYG pensions systems, based on solidarity.
The Draghi report calls for moving all of Europe's pensions onto a capitalization system. Those have advantages and disadvantages. Just remember they did exist, and we scrapped them for a reason.