Can Left and Congress align again?

As a answer to an ET debate:
http://economictimes.indiatimes.com/articleshow/4049709.cms

The left and Congress can have a walk in the park only and only if BJP is lurking around in the bushes. The idea i am putting across is, the politics of anti BJP is the only commonality between these two parties. All earlier Congress + Left coalitions have been only studies in convenience and way for Congress to garner Lok Sabha numbers.

I am not debating that Congress is bad or BJP is. The point i make here is that, being the largest two parties in the largest democracy in the world, Congress and BJP should have an active agenda, a plan for progress, which ought to be shared with junta. More and more, these developmental agendas will decide the fate of political parties in the elections. The case in point is Kashmir, which inspite of being strife torn and terrorism plagued voted for Bijli, Sadak and Paani! After elections, in case of a simple majority eluding the winner, post election alliances can be sort with regional parties on the agenda of development as set before elections already.

As far as the political spectrum is concerned, let the Left be "Left". Personally i dont see any leadership, perspective,coherence and vision in Left. From being anti 123 to Singrur fiasco to Achutanandan's comment on "stray dogs" at martyr Unnikrishnan's house to allegations of corruption, Left has not made any significant inroads anywhere in terms of a vision for a unified and developed country.

As an end note, I was impressed by L K Advani's blogs and website. Its very Obamaesque! Congress and BJP need to take a leaf out of Obama's campaign. Both Congress and BJP will have to draft their developmental agendas with or without the Left.