It's not surprising that AI could write code.
The concerns of AI are valid, in that they need to be maintained to systems that don't try to take over society.
Ultimately, if there is enough produced so that people can survive with little to no efforts, then the need for money will evaporate anyway and people can spend their time on ventures of passion.
Read an article recently where an A.I. was tasked with creating better iterations of itself, and within two generations, the A.I. was writing code that the researches could not decipher the meaning of. TWO GENERATIONS (which is nothing in machine time.)
My favorite story about AI was the nematode problem that had been plaguing science for a century. They were trying to analyze how they could regrow limbs. The AI was fed the data and it took a few hours before it came up with an answer that was verified by other scientists.