First, no ornaments were confiscated by the Spanish. When the expulsion was underway, they couldn't find anything. And you will recall Fr. Och's journals, in which he exults and mocks the frantic and futile search the Spanish soldiers undertook during the expulsion.
Second, the royal decree issued by King Charles III was never clear on the purpose for the expulsion, but it was not because of the gold or silver that adorned their missions/churches, or for the Jesuit's failure to document the "provenance of their gold."
And once again, when St. Ignatius stated that it was better to have a well-adorned church than a bare church, he was not expressing "a personal feeling," he was describing his vision of how the Jesuits were to build their churches, per Nentvig's Rudo Ensaya.