I think it may be because people get tired of saying "ill-gotten gains" and want to mix things up a bit.
Also it is embedded in the oaths taken by attorneys in many jurisdictions, so the phrase has had a bit of staying power, what with thousands upon thousands declaring that they "shall do no act for malice or filthy lucre."
Q would know why it is called “filthy lucre”.
I think it may be because people get tired of saying "ill-gotten gains" and want to mix things up a bit.
Also it is embedded in the oaths taken by attorneys in many jurisdictions, so the phrase has had a bit of staying power, what with thousands upon thousands declaring that they "shall do no act for malice or filthy lucre."