Economic growth also comes from getting more for less.
A company can increase their profits by growing and increasing both what they spend and what they earn. But a company can also increase their profits by reducing what they spend without decreasing what they earn. Almost all companies are constantly trying to do this.
Often (usually?) by requiring workers to do more for less pay. Automation will eventually solve this problem, but because of the need to increase profits, finding an alternative way for companies to economically support human life the way they traditionally have through employment will be a tough nut to crack.