Unlike others, they have a decent relationship with their worker's Union, which should be applauded.
https://www.retail-week.com/people/greggs-workers-accept-pay-deal-for-biggest-increase-in-12-years/7045255.article
"Over the past two years, the union has negotiated wage increases of over 15% with Greggs, meaning every staff member has seen a rise in basic pay."