Another technique for sparking innovation is adding constraints. 

"Constraints aren't the boundaries of creativity, but the foundation of it"
- this quote by Brandon Rodriguez says it all

Sometimes, setting conflicting constraints can ramp up the innovation process even more. This at first seems like a crazy thought. But conflicting constraints have led to breakthroughs before in other industries.

Without setting constraints, innovation may be hard to achieve — especially so when you are trying to drive a total experience that is seamless, frictionless and intuitive. If, on the other hand, you are dealing with an innovation of a big breakthrough nature, then it may be possible to let most of the creative solution to a known difficult problem filter up from the ground.

The culture that digital banks of the future must have can best be described as nonhierarchical, with a high degree of involvement and candour, a lack of bureaucracy, low ego but high mission orientation, a clear sense of mission and purpose, where rank is less important than substance.

If you build this within an existing complex entity's structure, it will in most cases fail. This is why when people ask me whether the digital bank should be a standalone unit, separate from the main business, my answer is always an unequivocal yes. And once it has taken off, don't try to then merge it with the main business — it will destroy the culture and with it the people you attracted who wanted to work in such a culture. Instead, ensure that whatever innovations are born of this culture are shared with the mothership.