As an employer (paying a bit more than the minimum on entry level jobs) for nearly 7 years now I can tell you I've met plenty of people that'd rather be on benefits that work. Many have been honest about it: after working full time, putting in the effort and stress for that time, but paying taxes on most of it losing benefits etc then they work out they're not much better off and they decide it's not worth it.
The effective income tax for someone on low income can be about 90%. I find that repugnant. Its wrong and it traps people to being poorer than they could be, and on our taxes. We and they both lose.
I think the effective income tax for low earners should never be lower than the actual income tax for normal let alone higher earners.
No con.
I honestly think the system currenty is broken - here at least. As an employer my only benefit is recruitment etc would be simpler without perverse incentives.
That is exactly what I think for a culture here in the North West of England it is definitely acceptable. As for effort, an appointment at the Jobcentre once a week/fortnight is no effort compared to a job.
When I got my mortgage I was offered unemployment and sickness insurance by the bank.
So what? The billionaire would be paying a fortune in tax (bankrolling the system as Minx pointed out) so what difference does it make if his wife gets it? Besides, it'd not just be nothing compared to their billions so why bother?