You are technically correct, in the literal sense that managers and executives have work to do.

It should be noted, however, that it is the workers (not the company owners/investors) that create all the products that are up for sale and the infrastructure necessary to begin production (e.g., roads, bridges, electricity, education, etc.). Hence, when a CEO say that they "built" the company, they are obfuscating the exploitation of the labor of workers who transform raw materials into all the useful commodities we enjoy.

But they don't necessarily have to earn so much more than the average worker.