Cameron to freeze publicsector pay for those on over £18k?

I heard last night that apparently one of the things David Cameron has promised to do if elected is to freeze the pay of all public sector workers on £18k or more a year. This is presumably because it was nurses, doctors, refuse collectors, care assistants, neighbourhood advisors &c who caused the recession we're currently coming out of. Meanwhile the bankers and city traders who provide vital public services and keep the country running finally get the pay rises and bonuses they so richly deserve.