There's just so much of this book that doesn't appear to make sense - and that's the reason I dislike it so much. I actually find myself getting annoyed when I read it and no other Pratchett book does that to me.
I agree that in the earlier books we have seen a sort of breaking of the bonds of slavery regarding the golems. But then, with this book, we seem to take a huge step backwards. It's as if the black slaves in the US were freed and eventually got equal rights with everyone else and then along came a new race and everyone thought it would be a good idea to bring back slavery.
The whole thing with Moist controlling the golems because of his suit seems somewhat slapdash. He couldn't have known that that would work and it doesn't make things right by getting Vetinari to say that he knew the golden suit would work either. I just don't buy that explanation.
It seems as if the golem horses and at least some of the new golems are going to be put into service and no one is mentioning paying them. Will the city golems buy them out of servitude? Somehow I don't think so. It's like the new golems have become the acceptable face of slavery.
The new currency is being based on the fact that the city is now a slavocracy.
This whole book is just a mess of ideas that do not come together properly. It's a most unsatisfying read and, in my opinion, the worst book Terry has written.
Honestly, if Raising Taxes ever does get written, I'm going to seriously consider not buying it.