Just read this interesting article: http://www.theguardian.com/commentisfree/2013/dec/09/how-journals-nature-science-cell-damage-science .
Feel free to read it and post your impression/opinion.
I think the problem is multilayered and not a simple good or bad answer can be given. I have the feeling that the current system is a circular conclusion: publish high impact, get more money, publish more high impact / start out in a less renounced lab (for whatever reason), don't publish high impact, struggle for money/positions and have less chances to publish high impact.
Probably recruitment and funding should be less based on previous high impact publications but on the ideas and proposed projects. But then how are they to quickly filter the masses of applications?
So perhaps it's clear that the system isn't fair and a quarantee for 100% good and solid science, but maybe the net outcome is that generally good science that is currently 'sexy' is promoted?