You just never know when a cash-strapped government might dip into your retirement fund. From Jeff Thomas at internationalman.com:
As a general principle, I’ve always tended to avoid entrusting others with my money. I’ve avoided funds, as they are often based upon investments that are peaking or close to peaking. I’ve avoided pension funds, as they’re often structured in a similar manner.
And whenever by law I’ve been required to be invested in such funds, they’ve rarely been successful over the long term. In the end, I would invariably have made more money by pursuing those investments that had great promise but at the time were unpopular (and therefore underpriced).
As dubious as I tend to be of conventional investment schemes (and those who broker them), I am doubly dubious of any government-run scheme. Governments, historically, have proved to be poor money managers, and politicians tend to place more value on big promises that garner votes than on delivering on those promises.
And so, I’m predictably biased as to the likelihood of any form of fund that any government may be involved in. Even if it’s structured well, which it may well not be, governments, if they have the power to do so, will tap into the fund, draining it of the intended recipient’s contributions, leaving the fund exposed, should a crisis occur.