In 1717 he moved from Naples to Venice where he lived with his uncle (a priest) for nine years studying business economics.
In 1743 Trattato de' tributi, delle monete e del governo politico della sanità was printed.
In this book he argues that the tax system should be reformed and based on the individual contributory capacity.
In 1754 Broggia wrote Memoria ad oggetto di varie politiche ed economiche ragioni, a controversial book against the fiscal policy imposed by the minister Leopoldo De Gregorio which took him to exile.
Back to Naples in 1761, he wrote Memoria contro il dazio del minutillo in which he expresses his ideas against the export taxes.