Answer:
Because if they don't have wealth they won't be able to buy their supplies and hire crewmen. They wouldn't be able to get ships and boats.
The correct chronology would be as follows:
The US government establishes the office of Indian trade. In 1806, Congress created the Office of Indian Trade, an office in charge of supervising the network of public Indian trading factories that the US had from 1795 to 1822. This office was closed in 1822 because of cases of corruption.
The Choctaw sign the treaty of dancing rabbit creek. The Treaty of Dancing Rabbit Creek was a treaty signed in 1830 between the Choctaw Nation and the United States. This was the first removal treaty put into effect under the Indian Removal Act passed by President Andrew Jackson that same year. As a consequence of this act, the Creek ceded control of large part of their territory in what today is Mississippi in exchange for land in Indian Territory, today Oklahoma.
The Supreme Court rules in Worcester v. Georgia. Worcester v. Georgia was a legal case in which Chief Justice John Marshall ruled, in 1832, that the relationship between the American Indian Nations and the United States was that of nations; consequently, only the federal government, and not the governments of the individual states, had the power to deal with the American Indians.
The US government forces Seminole tribe to relocate from Florida to Indian territory. Per the Indian Removal Act of 1830, the Seminole Nation was forced to relocate to Indian Territory. Some of the Seminoles were removed after signing the Treaty of Payne’s Landing in 1834. However, the majority of the nation declared the treaty illegitimate and refused to leave. This resulted in a struggle known as the Second Seminole War (1835–1842). As a consequence of this war, most of the Seminole Nation had to relocate from Florida to Indian Territory.
The Supreme Court here in Roe v. Wade used the compelling interest test.
To put it simply the compelling interest test is used by the court, federal or state, to check the if the law is constitutionally valid. In the Roe v. Wade case the Supreme Court had to see if the right to privacy of the 14th Amendment is applied to abortion and they decided it did. They used the compelling interest test to balance this with the state's interest in the welfare of women and the potential human life that is the baby. So the court limited state's regulations on abortion.