The US federal goverment, more specifically the US Congress (the legislative branch of the federal goverment), has the power to collect taxes and coin money, as included in Article I, Section 8 of the US Constitution.
<u>Inferior goverment levels, such as state or local goverments do not have enough authority for this. </u>
His goals were to find the Seven cities of gold. His expedition was labeled as a failure by Spanish Colonial authorities. He returned to Mexico and died in 1954.