In Florida, that is not the case, unless their law has changed since 2013.
A mandatory minimum of 40% goes to the living wife. That money can also be placed in a Trust, which pays all the annual Trust income to the wife for life.
After the wife's death, a new Trust beneficiary can be named, such as a charity, children, etc., or the Trust can be terminated and all the Trust assets distributed to new beneficiaries.
it might take a spousal election instead of just automatic