Asklemmy

This is the way I see it:

Primary sector: Agriculture - Sickle - Manufactures edible goods
Secondary sector: Industry - Hammer - Manufactures non-edible goods
Tertiary sector: Service - Mop - Helps people through transporting goods, repairing goods, cleaning, healing organisms, cashiering and catering.
Quarternary sector: Authority - Pen - Provides Law and Order through Government, Justice, Police, Education, Political, Media and Mental support (Psychiatry & Religion)
Quinary sector: Finance - Banknote - Gambles
Sextary sector: Automation - Cogwheel - Destroys jobs

As the service sector is large and sextary sector petite bourgeoisie than the service sector I suggest the following:

Mop and Pizza Box

I do think we're not there yet though.
Both objects are accurate but I feel like we need something more aggressive to show that we're revolutionary.
Hammers and sickles are both tools that can be used as weapons.

[edit #3]

Changed Judiciary to Authority.
Changed entertainment media from service sector to authority sector so now all media is in the authority sector, as plenty of entertainment shows have tried to and sometimes successfully driven people to adept to their political world views or even driven into political action.

[edit #2]

On second thought, perhaps I’ll replace syringe with pizza box. It evens out the sexes, both mop and syringe are practiced most often by women (cleaning lady and nurse), while transportation of goods is more often preferred by men as carrying goods can sometimes be physically demanding.

[edit]

I changed the Syringe to mop in the Tertiary sector as suggested by mech,
although I have to say that nurse is very common job,
which is why I chose the syringe.
Same goes for delivery person, but I'm betting on it being automated away faster than nursehood.

I crossed out cogwheel as a symbol for the proletariat as I realize that I consider a subsector of this (engineers) to be one part of the ruling class (the other being scholars) within socialism and thus not the proletariat.