Economically Tone Deaf
To obliviously, Ignorantly, and/or foolishly make financial/economic decisions, despite various information, and warnings, and risks, even worse so with other people's money. People who are Economically Tone Deaf are unaware of the long-term consequences and costs of their spendings and investments.
" John's son, Jesus Marry and Joseph, I swear, that man is Economically Tone Deaf. He keeps asking his parents for money just to spend on those stupid monkey images. God, I can't believe he's in his 30's.