Hiring a sound-alike isn't taking a job out of the economy for one. The original voice is able to accept the job at the pay rate the sound-alike took usually.
That is a Luddite approach to the subject I would say. Technology has always displaced jobs and rendered some skills useless. For a long time it has just only occurred to unskilled and/or manual labour, most people have no issue with that. Now we're starting to see skilled and creative labour getting hit by it, but why should that be any different?