one who doesn't care about their debts because they are rich (metaphor) (see Molina)
The Florentine Codex provides discourse around past rulers, including a discussion about how a leader concluded his work, putting things in order. Thus, the phrase in this context seems to be the opposite of one who ran up debts, and we can see that it uses two negatives.
amo yma amo yicxi oitlan cahaqujco = He did not come inserting his hands, his feet under [his cape] (central Mexico, sixteenth century)