I mean, we already see Foggy buttering up Brett's mom with cigars to get cases, so why wouldn't he do a thousand more things to help save Matt?

Alternatively, I'm sure this could be taken in a dark way, if someone wanted to write the gang quietly making kills to satisfy Death. That is, he is only satisfied by souls, so he wants some to replace Matt's. (Disclaimer: have not read Pratchett's Death, will get on that soon)