You might find that the tale is about money changers who changed various things into shekels so that the client could then pay the temple tax [1]. I don't think that line of business is connected with usury, unless you look at making a market in an item using a bid-ask spread as selling a cake and charging separately for its consumption [2].

[1] https://www.bibleodyssey.org/en/passages/main-articles/jesus... [2] http://www.yourfaithyourfinance.org/money-and-faith/usury-an...