
“The problem with socialism is that you eventually run out of other people's money.”
Speech to the Conservative Party Conference (10 October 1975) http://www.margaretthatcher.org/document/102777
The last sentence is widely paraphrased as "The trouble/problem with socialism is that eventually you run out of other people's money."
Leader of the Opposition
Variant: They’ve got the usual Socialist disease – they’ve run out of other people's money.
Context: And I will go on criticising Socialism, and opposing Socialism because it is bad for Britain – and Britain and Socialism are not the same thing... It's the Labour Government that have brought us record peace-time taxation. They’ve got the usual Socialist disease – they’ve run out of other people's money.