OP, you are getting stick on this thread, but I am not going to join in.
What I would say to you is, as an ex SAHM, now working FT, I would NEVER give up my independence again and not be self sufficient. So, my answer is NO do not jack it all in and go on benefits. Also, owning property now is a good thing. Try and pay it off as quickly as possible to free up your other cash and take the stress off you both.
The thing is, the UK is broke and Labour has to do something about the welfare bill and the amount of people getting it. If they don't then we will get a right wing government who will go even further. So, sit tight as I predict things will get better for working people.
I resent paying for everyone else too. You need to have a good old long look at your finances and see where you can claw some things back. For example, are you maxing out what you can pay into your work pension. Can you adjust it so you pay more into it, then less tax. Are you claiming everything you are entitled to from the state? I pay zero tax because I have cajoled my gross pay and the amount of money I pay into my work pension so I only pay NI.
Can you allocate a budget for you and your DH to spend on whatever you want every month? Are you getting rid of all your excess on Vinted or eBay?
If I was in your shoes I would be watching every penny and making sure I am only paying in tax what I absolutely have to, by tweeking both co. pensions and maxing out our work benefits.
As for your DC. You don't need to spend loads on them. What are you buying?