"Under the present unitary resolution, we cannot find an answer to our issues," Mr Senathirajah explained in an interview with Sunday Leader.
"We need to bring all communities under one country, but these bankrupt politicians say if a federal solution is sought, it will divide the country. I think the country will be more united under a federal system."
Rejecting the notion that Tamils are asking for too much, he added:
"The constitutional changes are very important since locally and internationally the Tamil national question should be solved. Also the war affected areas need to be rebuilt, particularly in the North.
That is why even the international community and the UN accepted that the Tamils have been wronged, and they need to be given the opportunity to live as equal citizens in this country.
That is why even the UNHRC intervened, and now Sri Lanka agreed to address and resolve the Tamil issues.
We are not asking for ridiculous things, we only want to live freely in this country because we too have the right to. Surely that is not too much to ask for."
