These companies are often in quite high profitability, so they could probably spare this excess slack - but they do have a legal duty to their shareholders to make the maximum profits possible. Businesses can also change over time and a dynamic business is much more likely to survive in the long run. Those who do not adapt will die out and even more jobs might be lost in that scenario. Then some business sectors just disappear entirely, which means new avenues for profits must be found or the remaining departments could be better optimized. These companies are back on a high after having rather huge dips over the last years, at least in the stock market, which showed that they are not infallible to the ebbs and flows of the economy either.