That's why I go with base pay and multiply it by the PL and then tweak it by the Johnson:
Let's say a woman wants to get rid of her abusive schmuck of a husband. She knows where he's gonna be and when, which means no leg-work needed, and it's in the Barrens, so finding a way to dispose of the body will be easy. That's definitely a single day's work, tops, since it's basically show up, double-tap, bring the ghouls dinner, done. (2,000¥ * 1 = 2,000¥)
The guy, as mentioned, is a schmuck. He may have a Light Pistol on him, and maybe a couple buddies that are similarly armed, if they even have that much. Definitely PL 0. (2,000¥ * 1/2 = 1,000¥).
The wife is definitely poor, being a Barrens-dweller, and can't afford even 1,000¥. She's desperate, though, so she's been scraping together every penny she can spare to get this done. Probably been saving up for months. It's chump change to a professional Shadowrunner, but she's managed to get together 500¥ and now she's trying to find a Street Samurai willing to work for half the going rate because he wants the good karma.