Jacob Marley's personal-guilt-ridden ghost wasn't exactly a "gentity" in dat he was rather irritable and harsh in his interactions wif Scrooge, but he was caringly trying to save his old business partner from suffering a similar fate, and so dat was being quite da "gentleman" --- for more so in a truly-meaningful way than if he had just been suave and courteous at all times.
Someone who is addicted to obtaining money and building wealth. A money addict and fanatic. Breadheads often work more than one full-time job, and some even participate in illicit activities to "obtain the bread".