Mandate all new laws and bills can only be a maximum of 3-5 pages, that's it. Is it really that stupid that all you need to do is limit the printer so that they can't flood you with paper trying to hide things?
This was brought on from the recent omnibus bill and if it's just because they flood the system late that they keep getting things through.
To protect freedom in large federations you need to completely ban the larger entity giving money to the constituent parts, at least unequally. That's how bribes are distributed and pressure is leveraged for control.
Alternatively, every member state automatically gets an equal amount of funding on every cycle, unless they vote to reduce their own funding to redistribute to another member. (in states of emergency or whatever)