@ former trader your views somewhat supports Oliver Wyman’s 14th annual State of the Financial Services Industry report, titled _ "The Financial Crisis of 2015: An Avoidable History _" presented in Davos, Switzerland during the 2011 Annual Meeting of the World Economic Forum.
In this report, (though written in 2011 seems quite conforming to today’s scenario in many ways) they posit that although financial services executives and regulators have worked to design a more stable financial system in the wake of the global financial crisis, they should nonetheless be prepared to consider a variety of adverse scenarios that could create another crisis in the future. The report describes a possible scenario for a future financial crisis. Under this scenario, the risk forced out of the Western banking sector by tougher regulation then flows into the shadow banking sector and into emerging markets, forming bubbles in commodities and related assets. The bursting of these bubbles in turn triggers sovereign debt restructuring in vulnerable, developed markets. The report suggests this is only one of the potentially adverse scenarios financial institutions and regulators could face that should be stress tested in order for industry participants to better manage risks and shape their strategy development.
Though I don’t find his arguments totally confirming with what I think may be the future scenario as presented by him (probably that is why he himself has made his conslusions conditional) it explains plausible reasons which indirectly leads to your conculsion too . You may read it at
http://www.oliverwyman.com/media/OW_EN_FS_Publ_2011_State_of_Financial_Services_2011_US_Web.pdf
So, there will be still be winners , but not only much less than in the past but also wiould highly dependent on "better management of risks and (how the industry participants) shape their strategy of development.