The problem with Tsipras and his government is the same problem with just about every other Greek political leader, they refuse to make the big decisions when their political future is at stake. Elections were held 5 months ago and they received their mandate. Calling for a referendum is a cop-out, placing the burden on the people as opposed to the government the people elected. The people elected you now make the tough decisions that you think are in the best interest of the country without worrying about your political future. Unfortunately the political system in Greece is incapable or unwilling to do so.
Even more disturbing is that the proposed solution is to further choke the private sector- the only portion of the economy that is capable of producing something, so the public sector can remain the bloated resource-sucking entity it has been. That is just as counter-productive as the memoranda which contain no legitimate means for debt relief. Events are truly taking a tragic turn.