I'm not sure it's actually as egalitarian as it first sounds. Low-income jobs tend to be a lot less forgiving to being an hour late for work, than higher-paying jobs.

Back when I worked in food service, being an hour late probably meant today was your last day. Now, I'm not sure anyone would actually notice. Higher up, if you're late, people will wait for you.

If a 1-hour timeout creates a split between "so I lost my job" and "so I finished an hour later", it's still punishing the poor more.