Health Minister Fernando Llorca Castro will replace Sáenz starting Thursday and Vice Minister MarÃa Esther AnchÃa will temporarily work as Health Minister.
Union leaders demanded that President Luis Guillermo SolÃs ensure the immediate dismissal of Caja Executive President MarÃa del RocÃo Sáenz Madrigal.
Caja Pension Manager Jaime Barrantes said they will evaluate the unions' petition along with others that they have received from other groups in recent days.
Union leaders hope to block vehicle traffic along the capital’s Second Avenue, in front of the Caja’s main building, to get the institution's attention.
Delays on the approval of fiscal reforms prompted Fitch Ratings to downgrade Costa Rica's Long-Term currency bonds earlier this month and ratings for six banks, including four state-owned banks.
May Day in Costa Rica brought together protesters from public workers unions and a wide variety of other groups, including students, sex workers and indigenous people.
