Even in retirement some people over save. You can at least spend all of your dividends and half of the retained earnings of the company's that you own. To make the calculation take the earnings per share subtract the dividend and divide the result by two.
If the companies you own are not growing earnings fast enough to make up for the stock that you will need to sell to get the money above the dividends then they are investing retained earnings very badly and you should change to other companies. An alternative is move to utilities. utilities generally pay higher dividends and rise with inflation.