It is the only way. For example: a machine does the work of 1000 men. So 1 man handles the machine and the other 999 do what?
The other 999 will get some other job.
For example, as I had pointed out earlier, the invention of computer and internet has created tens of millions of jobs. There are millions of website owners, who earn decent income by displaying third party advertisements on their sites. And there are even more number of content creators, who lend their services to these website owners. Technology always creates more jobs than it takes away.