Purpose – This paper aims to investigate the possibility of a methodological error made by the concerned scholars and academics of Islamic finance & economics to understand and study the modern framework of financial institutions, where they intend to practice Islamic law of contract. This error has led them to expect something which the institutional modern framework of banks, adopted by Islamic banks (for e.g.), wasn’t designed to accomplish, hence the disappointment. Design/methodology/approach – This study reviews the literature on history of evolution of banking industry and the corresponding ideological and cultural changes in the European society which drove this evolution; this is followed by a conceptual analysis to identify the institutional components inconsistent with ethos of Islamic norms and ethos. Findings – After review of history and evolution of modern banking framework, in the light of Hollingsworth frame of institutional analysis, it is inferred that the said framework was designed for a secular, liberal and capitalist society to efficiently and effectively enhance freedom and accumulate capital and wealth, without much regard for equitable distribution of wealth and economic justice. These goals are very much in contrast with the normative premise of Islamic Economics, which cannot be efficiently used to achieve the related objective. This indicates that framework of banking was narrowly understood by the concerned scholars and academics, without considering its history of evolution and intended objectives, before adopting for IBs. Practical implications – The disconnect between the Western institutional framework and ethos of Islam implies that the concerned need to look deeper and holistically while adapting Western institutions, so that necessary alteration is done in advance, if such an adoption is inevitable. Originality/value – This study introduces a new dimension for the concerned scholars, academics and practitioners to reanalyze the institutional framework adopted from the West, so that necessary adjustments can be worked out to make the said framework compatible with the ethos of Islamic economics.