I think you are missing the point. Of course, many deserving people are hugely struggling on benefits and receive very little. This is wrong and I think most people would agree with this.
However, there are a number of people on benefits who could work but choose it as a lifestyle choice and claim for lots of extras effectively working the system. Many also work cash in hand. I'm sure lots of us know people who don't work and who are on benefits and yet seem to have more than many on low incomes. This is what I have a problem with.
We need to be encouraging those on benefits who can work to work by making it more financially attractive. For example, greater help with childcare would help, or increasing the threshold at which people start paying tax. Not increasing the tax burden of those at the very bottom of the salary scale.