Here asalfo the leader of magic system explains that way back in the days a label offered him 80K dollars which was a lot back then to go solo,and he rejected the offer,because he did not want to let his brothers down,he is the oldest of them and he has to lead by example
for him a real leader is the one who thinks about the wellbeing of everybody even if glory lies upon his shoulders more than the rest
he says the other guys are good singers aswell but they trust him to lead every single song for almost 30 years and if he thinks about himself only it will also weaken him,the other guys might lack their lead singer,but he might lose aswell important guys for chorus harmony which is crucial to their style
you'll never hear 99,999999999999 per cent of congolese artists thinking like that,as soon as they hit some glory everybody is replaceable and his contribution belittled in most cases,its when they lose the main soloists that you'll hear that he just interpreted the 10 reserve soloists or that its the leader who gavehim the whole generique partition with his mouth