If people on welfare make more than people with jobs, then the problem are usually those with jobs who make less.
You cannot trust everyone to accept a job because that's economically feasible, not everyone is a homo oeconomicus.

I've heard of people who wanted to accept a job far away, gardening for 3€ an hour, even though the cost of driving there and back would've been more than the wage...
Some people accept horrible jobs just to escape the stigma of being unemployed and so on. To say that welfare is too much just because some people who don't calculate earn even less is not a solid argument in the real world.
It's just too concenient that some are even forced to accept such jobs to lower the unemployment statistics. I think here you still get the difference between your wage and welfare as welfare though to ensure you have the minimum living standard, which is whatever you get as welfare.