I was once told, for true renunciation to arise, one way is to have it all. Historically, we can relate this to Buddha Shakyamuni and Atisha, who were born as princes and really had it all. Buddha Shakyamuni then went on to lead a "wretched' life of being an ascetic, living on one grain of rice a day. He truly appreciated the spirit of this topic and that lead him to the "middle way" path and today Buddhism is known as the "middle way".
It may be controversial to say this, but not many people can truly renounce because they crave for the things they never got or will probably never will. So just renounce on that basis, will leave a nagging feeling of "what if I had that?". This is also the reason why Buddhism has a negative perception to non buddhist as a religion for losers. If will be great if the richest billionaires in the world renounce or at least become buddhist to alleviate this image. For being Buddhist does not necessarily means one must give up all worldly things. It only means one must realise that these worldly things are not permanent. Even the richest people in the world has sufferings. The have a glorious life of material and comfort but also a wretched life in the suffering of pain, uncertainty, change and death.
By truly leading a life on both the extremes can one truly realise the "middle way" like the example of the Buddha Shakyamuni.