  Another popular argument against open borders is that the influx of newcomers will hurt the economy. In its most straightforward version, this argument simply assumes that the domestic economy can support only a certain number of workers, but more nuanced renditions allege more specifically that at least some types of foreigners should be excluded because, given the cultural differences between insiders and these particular outsiders, the inclusion of the latter would not be conducive to economic growth (perhaps because these outsiders lack the requisite work ethic, for instance).