Because people such as the OP believe that unemployelment in this country is costly and takes money out of their hands to pay for it.
It's an over simplified, misguided and poorly researched stance to take. One that has come from biased media and those pushing division.
Here's an oversimplification for those that need it:
The tax in a workers pay packet goes to a general pot. The same pot as VED, VAT, Inheritance and lots of other forms of taxation.
It's then spent on various things by the government. Education, health, defense etc
Out of all the bills the Government pay using tax, Unemployment is, in reality, a very small percentage. It's around 2% of the welfare bill, which itself.
But the government and media have pushed a demonising of the poor. Labelled them Scroungers, pushed programs such as Benefit Street, Benefits By The Sea etc etc.
People fall for it, get angry at the tiny relative amount paid to the unemployed and ignore the huge sums paid to MPs and people connected with the MPs. (Billions lost in fraud and PPe could have paid the unemployment bill for 5 years+..)
is OP demanding the MPs pick fruit to pay it back? Or the profiteers to return that defrauded cash? Nope.. it's the tiny tiny percentage of unemployed people that get...
Now wait for it here..
£343 a month.. that's it. That's what unemployment is in this country.
They add on housing and child etc, but those in work can claim those too. The actual figure that the government believe an adult of 40 years old needs to survive is £343 a month. Food, electric, gas, council tax, internet, insurance, travel, clothing, haircuts, personal care. Etc etc etc.
And there's OP, begrudging them that.