Why conservatives have more empathy than liberals

Britain goes to the polls next week and the Labour leader, Ed Miliband, is clear about what the choice is.
For too long, you have been told something that simply isn’t true, Miliband assured supporters as he announced his program. That’s what’s good for the richest and most powerful is always good for the whole of our country. That as long as a few individuals and companies are OK, we can just wait for the wealth to trickle down to everyone else.
Really? We’ve been told that? By whom? Who has spouted such bilge? Type trickle down economics into Google and it’ll prompt you with myth, criticism, debunked and doesn’t work. But you’ll search in vain for anyone actually proposing the idea.
Not that this deters leftist politicians, election after election, from tearing into it. Here, for example, is Barack Obama in 2008: We can’t afford four more years of the theory that says we should give more and more to those with the most and hope that prosperity trickles down to everyone else.