Which country use tax brackets as part of their tax system?

Tax brackets in Australia.Tax brackets in Canada.Tax brackets in India.Tax brackets in Malta.Tax brackets in the Netherlands.Tax brackets in New Zealand.Tax brackets in Singapore

The three main reasons that the Native population declines in Spanish colonies was because they were overworked by the Spanish, they also picked up diseases like small pox, and they faced hunger. Overall, the Spanish did did not see to it that the Natives would be cared for.