Leadership is always about when and where the buck stops. Ultimately, everyone will step aside or fall away when a truly difficult issue needs to be resolved. If there is a way for the difficult issue to be "bounced up" in an organization, it typically will be.  This fact can give a leader a bit of a "hero" complex - "The issue is coming to me to fix!"   Well.... not actually.  It is coming to you because others are not necessarily confident in their thinking about the resolution - or - they don't want the possible negative  fallout if they are wrong in their resolution. Thus, it comes to you because you are the last stop!

What you don't want to do is try to actually be the hero and resolve the issue alone.  If an issue is big enough that others are hesitant about its resolution, you can rest assured they do have ideas that might assist. They were just not confident enough without your support or agreement.  Therefore it is important to ask others their opinions. 

It is also important if the solution comes from someone else's input.  By giving them credit and support, acknowledging their solution, you show them respect and support and they respect you more.   True leadership is not about making the tough decisions, it is about building others capacity within the organization to also make decisions.  The ultimate leadership function is to make sure decisions are made at the appropriate level, with trust and respect. 

Input from others is important, but "the buck stops here," cannot be avoided. How each of us handles that fact helps to determine how others see us as leaders.