It scales in Finland though which is probably what parent was thinking of. And we do have scaling fines here in Sweden, just not for minor traffic offences. I think we should change all normal fines to scaling fines (dagsböter).
In general as a percentage of the last year's income. "In 2002, a Nokia executive was fined the equivalent of $103,000 for going 45 in a 30 zone on his motorcycle."
Elon's fine could easily be 10x that but maybe not 100x. I don't know his finances and I'm not sure how capital gains are included.