Doesn't some of those "helps" came with debts for Portugal? The English were well-know money lenders after all.
I think they charged for the protection of the portuguese fleet that sailed to Brazil during the Napoleonic Wars if I remember right.

Also, the English stimulated a full-scale war between Brazil, Argentina, Uruguay and Paraguay (Everyone vs. Paraguay) due to commercial competition between them and the paraguayans in South America (Not to say that Paraguay had quite a megalomaniac ruler at the time). The war caused heavy losses to all of the involved countries (Not to say, big debts with the English due to the purchase of guns and everything) and 75% of the male population of Paraguay was killed.
Curiously, the first international loan in the history of Paraguay was with the English to pay the reconstruction of their country.