I’d argue that it was a core feature of historical liberalism. Recall that Locke’s original formulation was life, liberty and property.
He also thought that the children of the poor should be forced into workhouses from the age of three onwards, BTW. And was heavily invested in the slave trade.
No, Thatcher was in no sense a liberal. A neo-liberal yes, but not a liberal - these are completely separate things.
In the UK the Liberal Democrats (the successors to the Liberal Party) sit straddling the centre-left/centre-right divide with Labour on the centre-left to medium-left and Tories on the right to hard-right. The far right are occupied by the likes of UKIP.
To compare to the US the Democrats are roughly equivalent to the Tories and the Republicans are some distance past UKIP.