Imperial slavers often say that Imperial slavery isn't actually slavery, it's paying off a debt. It's the lie they use to make money from other people's debt fueled misery.
OK, then let's look at the Federation approach...
Federation demands you get a job in order to pay your taxes. They then bombard their people with ever-increasing taxes, newer taxes on whatever they can think of to tax, taxes that apply additional tax to other taxes, all topped off with a culture and way of life that forces people buy expensive (but generally unnecessary) things just to get by in society.
Those with low paying jobs eventually find prices and taxes have gotten too high for them to pay, so the Federation puts them on benefits, which are funded from the ever-decreasing number of people still able to afford taxes.
The icing on the cake is how all the richest Federation citizens make their money from investing in companies with registered offices in the Empire, meaning neither the companies nor the rich investors actually pay tax at all...
Federation citizens are slaves to the greed of the coporations and their rich-elite owners.
The difference between Federation and Imperial slaves is that the latter had the choice to sign up or not and it's for a fixed period only. Feds are slaves for LIFE!!
So, FedBoy - How do *YOU* like being a slave and being forced to pay out of your own pocket, for the greed of the rich and the idiocy of their creditless sheep??!!
Incidentally, I myself happen to be Federation born and bred (strong in the arm and thick in the head), although I'm currently in transit and en-route to greener nebulae... I suggest you follow my example.