1. BJP income rose after demonetisation. Parties don't pay taxes but file return for exemptions, expenses, etc. You don't even have to reveal the sources. https

1. BJP income rose after demonetisation. Parties don't pay taxes but file return for exemptions, expenses, etc. You don't even have to reveal the sources. https://www.dailyo.in/politics/demonetisation-noteban-party-funding-electoral-bonds-bjp-income-congress-income-party-donation/story/1/23500.html https://www.dailyo.in/politics/demonetisation-noteban-party-... 2. If a party already knew that demonetisation is coming, it could have acted accordingly. https://www.financialexpress.com/india-news/demonetisation-bjp-bought-land-worth-crores-of-rupees-a-week-before-note-ban/455728/ https://www.financialexpress.com/india-news/demonetisation-b... 3. Ruling party had an advantage on getting money, organisational structure, advertisement, etc, etc. Many vendors don't accept checks but real currency.