Except for clothing I would defy anyone to find anything you use on a daily basis that cost 50% or more in labor to produce.
Mass produced items, consumables etc will not cost that high. Handmade goods might because the laborer probably doesn't calculate all the hours, or considers it spare time, or has time to fill and it's better to make 49% than 0%.
How about ride-sharing? Just trying to rise to your challenge :-)