Lyric discussion by Lanta 

I feel like I've been living in A city with no children in it A garden left for ruin by a millionaire inside Of a private prison

The above lines seem to reference Oscar Wilde's famous children's story "The Selfish Giant".

I believe the song is Win's self-critique on the way the band's success may have changed his outlook on life, despite his best efforts to stay grounded and "in touch" with ordinary people - especially those from his childhood/past. A theory which is borne out by the next verse:

You never trust a millionaire Quoting the sermon on the mount I used to think I was not like them But I'm beginning to have my doubts

An error occured.