I don't understand how my son's father is over $20,000 in debt for child support but he picks my son…

I don't understand how my son's father is over $20,000 in debt for child support but he picks my son up in a brand new Malibu.. Tf! And brags about the promotion he got at work to Manager but yet hasn't paid a dime since September and even then it was only $47 when he's supposed to pay $420 a month... The system is fucked. For real. What am I gonna do with $47, buy a pair of socks and a couple twinkies for my son. Gtfoh. #deadbeats