I think it was right that he got the larger prison sentence than car guy (toby)
The car guy was found with a much smaller amount on him without links to the importing.
Daniel had pictures of several kilos in his house and was picking it up from the airport with lots of clear messages that he knew he was ferrying massive quantities around and storing
Ultimately every single drug dealer arrested always says they are holding it for a friend, and they aren't the mastermind. It was also axels defence, although much less believable. If you knowingly are moving around kilos of drugs than there is limited defence
As with most organised crime, the people with dirty hands are often exploited, and the real people that profit from it are miles away from it carrying much less of the risk.
It's the same with the last episode, those people were imported by gangs to remain in their debt to sell drugs. The gang then sacrificed them (physically dropping them off!) to police when it looked like it might impact the drug trade.
The real minds behind it, and people that are living off the massive profits aren't the people opening packages, having them in their houses or dealing it on the street etc