I'd give "In Our Time" from the BBC, and Econtalk, by Ross Roberts, a try if I were you. They both follow the traditional podcast format with a host and guest,

I'd give "In Our Time" from the BBC, and Econtalk, by Ross Roberts, a try if I were you. They both follow the traditional podcast format with a host and guest, but there is a lot of work done by the hosts ahead of time to ensure your time is well spent. Definitely high-density content.