Read how Lakoff framed the issue in a publication several years ago, then listen to the Obama and Warren speeches, they are not identical but very close substantively and linguistically (emphasis mine):

There is no such thing as a self-made man. Every businessman has used the vast American infrastructure, which the taxpayers paid for, to make his money. He did not make his money alone. He used taxpayer infrastructure. He got rich on what other taxpayers had paid for: the banking system, the Federal Reserve, the Treasury and Commerce Departments, and the judicial system, where nine-tenths of cases involve corporate law. These taxpayer investments support companies and wealthy investors. There are no self-made men! They wealthy have gotten rich using what previous taxpayers have paid for. They owe the taxpayers of this country a great deal and should be paying it back.