Ethan Shone @openDemocracy makes the case that Rachel Reeves (and Labour more generally) are now a wholly own subsidiary of the financial services industry & are focussed on a corporate-privileging agenda.
While this may (or may not) be exaggerated (after all we might point to some non-corporate favouring actions this year), nonetheless as an overall trend it does explain Reeves' position taking (as I have also pointed out before).