Only because the PO vote split with Nowoczesna. That statistic gets pulled up time and time again, and it only works if you consider PO and N. to be separate parties. Nowoczesna took almost all their support from the educated managerial/business owner class, and if they didn't exist, that group would have voted for PO en masse.
and actually they support the system even if not on the same scale as ZUS payers -
Yeah, a whole 300zł a month in contributions. Farmers are a huge burden on the system with the tiny inefficient farms.