A charitable reading requires fair consideration.
First, they didn't literally write the latter:
A: every leftist I've talked to
B: every leftist I've ever talked to
Second, if true, would imply that every leftist they've ever talked to will always get asked "who will run the garbage system, and who will clean the sewer" which wouldn't make sense outside the context of having given a specific opinion on a specific topic first.
Hence the topic of conversation is implied as context.
