you’re comparing apples and oranges. Most supermarket workers will work more than 67 hours a month. Assuming 40 hrs a week 2000 euros/month is only 12.5 euros per hour. It’s not minimum wage but not is it excessive.
But as far as the uniform goes, so what ? If you’re out of work and someone offers you a job you’re unlikely to turn it down because of the colour of the jacket. And if you evacuate you’re more likely to be recognised by your high viz jacket, probably.