In theory, the Dutch pension system is ALSO backed by the stock market, which is why they will cut down on payments if the stock market isn't doing very well (according to their own calculations). The more I hear about things like that, the more I'm inclined to just handle my own pension fund. But that's where things get tricky, because an employer's pension contributions are tax-free, if they were to be paid out, income tax would be charged on it.
The way I deal with this: make a good profit, pay myself a decent salary and the remainder as dividends, invest those in very low risk asset classes myself. It isn't quite as tax efficient as a pension scheme would be but the chance that the money will be there when I need it is about 100%.