I agree. I'm over pension age now, but if I wasn't and was made redundant or became too ill to work, I'd get £335 a month UC. I own my house, so no housing costs, and no kids.
That £335 barely covers my basic bills (energy, internet, tv licence, phone, insurance, water and the reduced rate of council tax - I'd have to pay 20% of the total, after the 25% discount for being a sole occupier). It would leave me about £120 a month to feed and clothe myself, and running a car would be out of the question. I wouldn't be able to afford to have the boiler serviced or anything else fixed or replaced.
I don't think the child element of £244 reflects the full cost of having a child, and unless the youngest was born before April 2017, claimants on benefits only get the child element for 2 kids (unless there's a multiple birth).
The biggest chunk of every UC claim I come across is the housing costs. Even council rents here are over £500 a month, private more than double that.
If there were enough council houses for everyone to have one, the "benefit bill" would go down by a significant amount, without people who need benefits to survive being any worse off.