2nd theme for discussion: The economic crisis, return migration and poverty

As the economic downturn persists, restrictive policies based on freezing the issuing of work permits (as in the case of Malaysia, Australia, Thailand inter alia) or offering financial incentives to encourage unemployed migrants to return home (for example Spain or the Czech Republic are multiplying. These measures are based on the premise that migrants take jobs from the native population, or that they disproportionately benefit from welfare services and that dire times call for dire measures. Yet is this a wise approach?