Foreigners paying ZUS contributions rose 18.7k in October to 1.286 million. Increase is largest since March. Over 80% of new contributors are Ukrainians at 15.2k. Total Ukrainians exceed 854k, over two-thirds of all immigrants. Foreign workers help businesses find labor and avoid wage hikes. Immigrants' contributions cut pension system deficits. Lower state budget subsidies needed for pensions. Presence mitigates bad Polish demographics.