German trade union leaders on Wednesday called for social justice and reforms to the strict constitutional debt rule as the country marked International Workers’ Day. May 1 is a national holiday in Germany, with unions traditionally organizing demonstrations for workers’ rights across the country. Frank Werneke, the chairman of the powerful verdi trade union, demanded that Germany’s strict “debt brake,” which caps government borrowing, be reformed or suspended in favour of greater investment in public services and climate adaptation. “Urgently needed investments in infrastructure, local and lo…