What motivates folks on the left? For some, it’s a simple matter of self interest. They belong to a group that benefits from favoritism or redistribution. Or, as Mark Steyn has explained, they want to create dependency for short-run political self interest.
For others, it’s probably a go-along-to-get-along strategy. If you work in Hollywood, your life is easier if you adopt the dominant belief system, even if you privately think it doesn’t make sense.
And don’t forget the folks on the left who assume that wealth is the result of some sort of scam (often because the rich people they know “earned” their money in less-then-impressive ways).
But what about ordinary leftists? Why do they support statist policies. My own personal guess is that they think good intentions make them good people, and they naively assume that spending other people’s money is a way of solving problems (which is the most charitable interpretation of FDR’s policies).
This Chuck Asay cartoon expresses this mindset.