Big countries will dominate  This system would create a tyranny of the majority that the current system guards against. The reason why smaller member states have greater representation is to prevent the possibility of the bigger states dominating in the parliament. Having smaller countries with a greater share of the seats in parliament ensures that their voice is heard. A change to a single constituency would change this to a big advantage for the bigger states. Under the current system in 2014 Germany will have 96 seats; if it were exactly proportional Germany would have 120 – a gain of 24 seats (presuming the limit of 750 remains the same). The smaller states will on the other hand loose seats and their voice in the parliament will become much more marginal.