Whoa there. Not paying a fine in a western country doesn’t necessarily (and doesn’t often) lead to jail time. Civil penalties are not easily converted into criminal ones, for obvious reasons (they punish poorer offenders for not being rich).
Of course most people do end up complying in one way or another (which means that the fine is eventually paid, even if very poor people might need many small installments).
I'm pretty sure that most other countries will also eventually threaten to imprison someone if they make no effort to pay a fine, otherwise many people would simply ignore them and never pay.
[1] https://www.gesetze-im-internet.de/englisch_owig/englisch_ow...
They will seize your assets, garnish your wages, but they won’t send you to jail, how would you even pay then?
https://www.npr.org/sections/codeswitch/2015/02/09/384968360...