Pensions cost the government 10% of GDP.  If no reforms are made by 2050, Brazil will spend more on pensions as a share of GDP
than many richer and greyer countries… Though Brazil’s share of young people is similar to that in Chile or Mexico, its pension spending is already at Japan’s level. That is despite a modest reform in 2019 that introduced a minimum retirement age. The population is ageing rapidly. Without reform, its social-security deficit, or the shortfall between contributions and payments, is set to rise from 2% of GDP today to over 16% by 2060.

Brazil’s courts cost 1.3% of GDP —the second-most expensive in the world—mostly because of generous pensions. The typical soldier retires before turning 55 on a pension equivalent to their full salary.

Here is more from The Economist.  By the way, Brazil cannot change its pension system without amending the constitution.