What is the role of banks and financial institutions in a true revolutionary society?

With a true revolutionary communist society being loosely considered on a superficial level as a society without any classist hierarchy and emphasis on the collective power of the general masses in the running of society, it would appear that the dismantling of capitalist-led systems through which repression and preservation of these ideals is observed is an important priority in achieving socialist revolution. The aims of the banks would thus appear somewhat counterintuitive and a direct hindrance to effectively bringing about revolution, which begs the question: can they possibly exist in a true socialist society and, if not, what could take their place?

When observing the fundamental means by which revolution can take place, it would seem absurd to disregard and refuse to acknowledge the presence of capitalism in society and its existence in the transition (considering socialism would feature the use of the income and products of their operation to the advantage of the lower classes, and hugely value these provided they are used and distributed equitably). As such, it would be clear that gradual progress towards a true revolutionary socialist society through bringing about reforms through the modification and removal of specific structures of power that perpetuate capitalist ideals using available and accessible means. These are most likely to be those gained through capitalism. While it may seem illogical to view socialism as not inherently anti-capitalist for these reasons, it would be arguably a lot more sustainable to view revolution as a gradual ongoing process than one achieved through mass purge of all individuals and institutions responsible for perpetuating vaguely capitalist or counterrevolutionary ideals. This logic can therefore be effectively applied to the question of the banks, in that once revolutionary aims have been achieved and the hierarchical systems ruled by wealth and ownership of capital have been overthrown, thus rendering banks unnecessary and a rigid distraction from a reformed socialist society, then foreshadowing their gradual dissolution. While it could perhaps be argued that the banks do have an important role in providing a concentrated supply of wealth to distribute equitably amongst the poor, this would likely only be apparent prior to the complete transition, in that the poor would only exist due to exploitation under a classist hierarchical system governed by the individualist capitalist interests of the bourgeois leading to a sense of alienation (and therefore a need for mass uprising and revolution against this) being apparent. When this system is abolished, there will be no need for this due to the aims of equitable distribution of wealth having been achieved, along with complete class consciousness for the true liberation of the working classes. This would, therefore, mean that income kept by the banks would now belong to society collectively to support reforms that could benefit them and continue the ongoing transformation of society in a continual state of revolutionary permanence. Moreover, as opposed to the funding of infrastructure and growth oriented projects (often with limited regard for environmental sustainability and the general wellbeing of the people, with these principles clearly appearing counterproductive in the eyes of capitalist investors) advocated by the banks currently, greater attention could be made to fund projects dedicated to improving society for the working classes and maintaining future sustainability and revolutionary goals would appear a comparatively better alternative means of using the collective assets of society. If banks were to still exist (most likely in the periods during the transition to a revolutionary society), these would most likely take the form of cooperative banks led and owned by their members, who would have the greatest role in assisting their operations, as opposed to large individualist and elite capitalist led corporations which is the form that many banks currently take. Democratic organisation within communities and the use of cooperatives with regard to proposing more ethical and transparent use of finances would thus prove to act as a comparatively more sustainable potential solution to a society currently reliant on assets from banks, once the core revolutionary efforts succeed.