The system is tight enough to forbids any form of manipulations but the problem is that will the people allow for that, they will definitely go against the use of rather finds a means they can as well manipulate the data entry they are going to submit to the blockchain network, the issue we can have is that, if the people at the top which happens to be our political leaders are taken the challenge of making things work out, then the whole process would have been easier to achieve fairness, just as you see it with the bitcoin network, the transparency is there including trust and immutability.