This isn't specifically a reply to you paul7388, but also those who left similar comments, because I'm slightly confused as to what's being advocated for here, or what you'd like to see happen?
The fact that the minimum wage is so derisorily low, and so many of the jobs come with so few rights (including of course those truly pernicious zero hour contracts), is an absolute disgrace (and indeed something New Labour allowed to shamefully proliferate on their watch), but the answer isn't to get cross with other working class people who are still in roles that do have those protections.
Leaving aside the oft-repeated falsehood that your average train driver is on nearly £100K (they're just not, although they are decently paid), surely a working class person being able to earn a good wage in a steady job thanks to being a member of a strong trade union is a positive thing?
What's our end state here, what are we trying to achieve?
That working class person earns more than me - PAY THEM LESS!
That working class person gets paid holidays and I don't - TAKE THE PAID HOLIDAYS OFF THEM!
That working class person gets sick pay, I don't get sick pay - TAKE THE SICK PAY OFF THEM!
That working class person is entitled to maternity/paternity leave, I don't get that - TAKE IT OFF THEM!
That working class person has a decent occupational pension and I don't - NO PENSION FOR THEM!
It's just a race to the bottom, get the proles fighting like cats in a sack and the rich make out like bandits whilst we're all busy arguing with each other. The UK government has printed six hundred billion quid since Covid started and siphoned it into the pockets of the rich, but it's NHS workers earning a modestly half-decent wage we're supposed to be pointing the finger at?
The best trick the Tories and their pals ever pulled was convincing working class people that other working class people are their enemies, and that all working class people are on the cusp of being rich so don't vote Labour because they'll tax you more when you're rich!
£15 per hour should be the UK minimum wage, that should be the target here, not suggesting that someone earning £15 per hour to work on a Saturday is somehow doing enviously well.