Tax credit changes would hammer families in Lichfield and Burntwood, according to Lord Fox.
He made his comments during a visit to a meeting of the local branch of the Liberal Democrats, insisting that the vote in the House of Lords which defeated the Government’s plans was necessary.
Lord Fox claimed more than 3,700 local families would lose out if the changes were introduced.
“The vote in the Lords stopped the Tory plans to hammer the poorest working families in their tracks,” he said. “I was disappointed that in a separate vote the Labour party abstained from absolutely ensuring Osborne doesn’t reintroduce these cuts.
“People can be assured that the Lib Dems will keep fighting to ensure hard working people are not hit a different way.”
The Liberal Democrats say the average family in Lichfield and Burntwood would lose out on £750 a year.
They say Conservative claims that those affected will benefit from plans to increase the minimum wage don’t stack up, citing the Institute for Fiscal Studies’ suggestion that the average loss would only be offset by £200.
The party’s local spokesman Paul Ray said: “The changes to tax credits will hammer families in our area. The move completely undermines any claim the Tories have of being on the side of working families.
“What makes this even worse is that 5,600 children in our area will now be forced to live in poorer households, reducing their life chances and making it harder for their parents to make ends meet.
“Study after study have shown that the Conservatives’ claim to be supporting low income families through a minimum wage increase nowhere near make up for these cuts. It’s time for them to come clean and be honest with those doing the right thing and going out to work.
“We worked hard in coalition to ensure that work would always pay more than choosing to remain on benefits – it is a disgrace the Conservatives are now undermining this good work.”