Hacker News Reader

I believe that they’re referring to Ben Bernanke and the policy of giving money directly to the populous, bypassing other intermediary institutions.

https://en.wikipedia.org/wiki/Helicopter_money

Berniebucks refers to the greatly expanded unemployment insurance distributed during the pandemic, which resulted from an amendment by Bernie Sanders. Bernie heavily criticized the unamended bill, especially the bipartisan giveaways to Wall Street, and refused to support it without his amendment.

Given the context, they seem to be using it to refer to direct-to-the-people stimulus payments, because Sanders is a Socialist and advocates for more such payments. (Though oddly non-pejoratively, based on their phrasing.)