The replacement of employment income tax with corporate or dividend income tax is not fully efficient. In the sense that the tax rates are different, they benefit different governments, through different time horizons (in case of dividends). While I agree it would be practical to rely on earnings tax when AI broadly replaces labor, we can still answer the obviously rhetorical question (similar to how "drinking ones own cerebral fluid" is obviously rhetorical) of "should AI pay taxes" - that there may need to be a tax reform.