Not wanting to digress, but often NPL players have a better life over a life span than pro players.
NPL players often have careers as well. When they retire from football, life does not change much, like it does for former pros in a range of sports, who don't have a trade or profession.
Many former pro sportspersons suffer from depression. The moment they retire, they often become nobodies, or just the average person on the street. Coaches stop contacting them - so do club officials, media, other players, etc. Social networks disappear - unless coaching.
Of course very rich players who've had many seasons in the UEFA Big Five are pretty wealthy, and can live off sage investments for the rest of their life.