L'enquête va plus loin : L'immigration en provenance d'Europe de l'ouest rapporte 1 milliard par an. Celle extra-européenne coûte 17 milliards par an

The study digs deeper still: annual net costs of non-Western immigration amount to €17 billion and the annual net benefits of Western immigration total one billion euros. Distinguishing between Western and non-Western migration patterns, the study comes to a startling conclusion: if immigration remains at 2015-2019 levels, the annual budget burden will increase from €17 billion in 2016 to about €50 billion. This is an increase that the welfare state would most likely not survive.