Contribuição à previdência oficial:

Social security contributions are compulsory payments paid to general government that confer entitlement to receive a (contingent) future social benefit. They include: unemployment insurance benefits and supplements, accident, injury and sickness benefits, old-age, disability and survivors' pensions, family allowances, reimbursements for medical and hospital expenses or provision of hospital or medical services. Contributions may be levied on both employees and employers.

https://data.oecd.org/tax/social-security-contributions.htm

2. Contribuição à previdência complementar pública

Complementary pension plan for public employees/workers

https://www.oecd.org/finance/private-pensions/42566007.pdf

Public employee = someone who works for the government, either in central government or local government

https://dictionary.cambridge.org/dictionary/english/public-e...

A public employee is a person who is employed by a government agency and includes the employees of a municipal, county, state, or federal agency or state college or university.

https://definitions.uslegal.com/p/public-employee/#:~:text=A...

https://dictionary.cambridge.org/dictionary/english/public-e...

NOTE: These two questions should have been posted separately. See KudoZ rules.

Complementary Welfare system available to as many workers as possible, with an effective and permanent action of public power in the unconditional defense

having as a pattern of the complementary welfare system, the three largest pension funds of Brazil (Previ, Petros, Funcef), in order to, within the real context of

Considering gender issue, among private sector employees, males workers enrolled in complementary welfare system amounted to 70% of the total enrolment,