He also opened the first lawyer’s office in Mytilini in February 1917, in conjunction with Petros M. Kairis. In late 1922, Kaldis took a prominent role in catering for the masses of Greek refugees arriving in the island following the Asia Minor Catastrophe. In 1928 the support he had been promised by George Papandreou (who had taken over from Venizelos as leader of the Liberal Party) for his reelection as an MP did not materialise. Consequently, he became a Senator and decided to retire from all political and professional life. He closed his lawyer’s office and lived quietly with his family, earning his living thereafter chiefly as a journalist. In 1904 he married Marianthi Matzikas (1885–1970), recently returned to Lemnos after finishing school in Alexandria. They had five children: Kalliopi (lawyer and ambassador, 1906–1990, better known as Dr Calliope G. Caldis), Eleftheria (married Ilias Iliou, 1908–2003), Manolis Caldis (civil engineer, 1910–1998), Christoforos Caldis (director of Hellenic Shipyards, 1912–2006) and Dimitris Kaldis (lawyer, publisher and editor of Δελτίο Φορολογικής Νομοθεσίας [Bulletin of Tax Legislation], 1914–2010). In 1946, after the Second World War, they settled in Athens. George Kaldis died in 1953, a man of rare integrity among Greek politicians of whom it was said that he had finished as poor as he had started: "Not one house, not one "stremma" (of land)" ("Ούτε ένα σπίτι, ούτε ένα στρέμμα")