No, You can’t create single wallet to integrate all other. As per Reserve Bank guidelines for wallets does not permit. Reserve Bank of India issues licenses to deserving entities to operate as a wallet. There are platforms that has integrated all popular wallets to increase customer reach. But, merger is not the solution. Interoperability of wallets is. So basically, a paytm user should be able to send money to a free charge account and vice versa. The RBI is undergoing a comprehensive review of wallet guidelines and Interoperability of wallets is also under consideration.