Well, Mme, and I've now sussed out who you are IRL, there's minimising tax and there's dodging it.
A US national has to file tax returns on all income earned abroad. Even benefits. And, after the $82,000 threshold, either show they paid it to another government or stump up.
A US national may also need to file a state income tax return, depending on the last state in which he/she is domiciled and/or the length of time he/she has been away.
And, as you know, a US national has to do this or formally renounce his/her US citizenship, and then still complete returns for 10 years.
That's the difference between minimising and dodging it.
And yes, UK nationals who have lived abroad actually cannot just come back, rock up and get on the dole.
Their kids even have to pay international fees at university in most places.
Tehre's even a poster on here who faced that very situation upon a return from France.
Oh, and once, again, he's a liar and a cheat.