The fact that you seem to think that everyone is employed by 'morally bankrupt' and 'scummy' companies just highlights how little understanding you have of this issue. The vast majority of people employed in the private sector are employed by small and medium sized companies, many of who would probably love to be in a situation that would allow them to pay their employee's more.
I think if you bothered to take off your blinkers, you'd quickly realise that a majority of business owners in the UK have a genuine interest in the happiness and health of their workforce - they're not out to squeeze them for everything they have, they just pay them what they can afford.
For you to suggest that any company who can't adhere to your ludicrous 'morals' shouldn't exist is just about the most deluded thing I've seen in this thread - which is quite an achievement.