Labour's Treasury Minister Chris Leslie spoke to ITV Daybreak about the new child benefit changes.
From today anyone earning more than £60,000 a year won't get the weekly allowance from the government.
And more than a million families are expected to be affected by the change.
He said the whole thing was 'completely upside down and very unfair'.
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The boy was found with knife wounds and died at the scene.
Harry and Meghan became the Duke and Duchess of Sussex when they got married last month.
No arrests have been reported.