Having a sufficient income in retirement should be a major financial priority, as it is obvious that one day you will retire and when you do, you will need an income.
At present there are tax incentives on offer for pension planning, which everyone should take advantage of, including those few who are wealthy enough not to worry about their retirement income.
Even business owners need to prepare for the future, they may think that at retirement they will sell off the business and live off the proceeds, however there is a number of risks associated to this plan, including the fact that the business may fail, or the proceeds may not provide a comfortable income, at time of retirement.
It is obviously advantageous to start saving for retirement due to the evident tax advantages on offer and the fact that the income from state pensions is not enough to see you comfortably through retirement.