Why not? Slavery's acceptable in Islam.
The Qur’an has Allah telling Muhammad that he has given him girls as sex slaves: "Prophet, We have made lawful to you the wives to whom you have granted dowries and the slave girls whom God has given you as booty." (Qur’an 33:50)
Muhammad bought slaves: "Jabir (Allah be pleased with him) reported: There came a slave and pledged allegiance to Allah’s Apostle (may peace be upon him) on migration; he (the Holy Prophet) didn't know that he was a slave. Then there came his master and demanded him back, whereupon Allah’s Apostle (may peace be upon him) said: Sell him to me. And he bought him for 2 black slaves and he didn't afterwards take allegiance from anyone until he had asked him whether he was a slave (or a free man)." (Muslim 3901)
Muhammad took female Infidel captives as slaves: "Narrated Anas: The Prophet offered the Fajr Prayer near Khaibar when it was still dark and then said, ‘Allahu-Akbar! Khaibar is destroyed, for whenever we approach a (hostile) nation (to fight), then evil will be the morning for those who have been warned.’ Then the inhabitants of Khaibar came out running on the roads. The Prophet had their warriors killed, their offspring and woman taken as captives. Safiya was amongst the captives. She first came in the share of Dahya Alkali but later on she belonged to the Prophet. The Prophet made her manumission as her ‘Mahr.’" (Bukhari 5.59.512) Mahr is bride price: Muhammad freed her and married her. But he didn’t do this to all his slaves:
Muhammad owned slaves: "Narrated Anas bin Malik: Allah’s Apostle was on a journey and he had a black slave called Anjasha and he was driving the camels (very fast and there were women riding on those camels). Allah’s Apostle said, ‘Waihaka (May Allah be merciful to you), O Anjasha! Drive slowly (the camels) with the glass vessels (women)!’" (Bukhari 8.73.182) There's no mention of Muhammad’s freeing Anjasha.
"This Is The First Drug Dealer To Be Jailed Over Modern Slavery After Forcing Kids To Work For Him," by Amardeep Bassey, Huffington Post, October 3, 2018 (thanks to Paul):
A drug dealer who trafficked 3 teens from Birmingham to rural Lincolnshire to run a crack den and sell drugs has been jailed for 14 years after the first prosecution of its kind.
Zakaria Mohammed recruited the vulnerable youngsters to extend his "county lines" drugs network to Lincoln, but was caught after 2 15-year-old boys and a 14-year-old girl were reported missing, before being found in a squalid and freezing flat.
The 21-year-old will serve half of his sentence before he's eligible for release on licence.
Mohammed, from Trinity Road, Aston, is thought to be the first drug dealer convicted in Britain for breaching the Modern Slavery Act by trafficking kids.
Police said Mohammed, who admitted four counts of possessing drugs with intent to supply and 5 counts of human trafficking, raked in £500-a-day in profit by organising the sale of crack cocaine and heroin from premises in Lincoln, that was raided in January.
Although no drugs were found at the property in Yarborough Road, police recovered knives, one with blood on it and cash, leading them to believe it was being used a base to supply around 100 local drug addicts.
A surveillance operation then identified a Seat Leon vehicle registered to Mohammed as making regular trips from Birmingham, often accompanied by teenagers, to an address in Lincoln’s Foster Street.
Officers from Lincolnshire Police recorded video evidence of kids passing drugs to punters – often completing deals every 10 or 15 minutes – and swooped on the flat in Foster Street on February 12.
3 15-year-old boys, all reported as missing from Birmingham, were found inside the one-bed flat along with 2 known Class A drug users.
A total of 25 wraps of heroin and crack cocaine were uncovered, plus cash and 2 so-called zombie knives