Neither of those examples include monetary compensation for the kidney. The paid time off work should be a given for someone who is donating a kidney, but they are being compensated by their employer at the same rate they would have been had they just gone to work. Someone who makes $15/hr would actually "make" less off the kidney donation than someone making $50/hr, but either way they could have just not donated the kidney and ended up with the same amount of money...and their kidney.