Policymakers tend to overemphasize the relevance of intervention in the area of standardisation for payments. It does take an economic/econometric approach but using that approach one can demonstrate that standardisation will always occur in the payments market (unfortunately the margin in this blog does not allow me the space to prove this theorem).
But practice may be supporting me in this theorem. See this press release that explains that four e-Payment brands in Japan are to use the same reader/writer. Those brands are: Suica, iD, QUICPay and Edy.
Which was exactly what also happened in the Netherlands upon development of e-purses and point of sale applications.