The MoJ presentation, produced earlier this month, sets out that Crown Courts are facing record backlogs with more than 78,000 cases waiting to be completed.
In practice, this means that suspects being charged with serious crimes today may not have a trial until late 2029 or early 2030.
Officials predict in the document that the caseload will grow to more than 100,000 before then, unless there is further action.
Earlier this year, retired Court of Appeal judge Sir Brian Leveson recommended that the government ends jury trial for many serious offences, saying they could be dealt with by a judge alone or sitting with two magistrates.
This would be done by creating a new intermediate tier of criminal court, dubbed the “Crown Court Bench Division” (CCBD) sitting in between magistrates’ courts and Crown Courts, where juries decide cases.
The CCBD would hear cases involving defendants facing sentences of up to three years, Sir Brian recommended.
The “DPM’s [deputy prime minister’s] decision”, according to the leaked MoJ document is to “go further than Sir Brian’s to achieve maximum impact”.
Speaking to BBC Radio 4’s PM programme on Tuesday, Sir Brian said he was “not prepared to comment” on the government’s “hypothetical” unpublished plans.
However, he said “substantial, structural change is essential”, adding: “Our criminal justice system is at crisis point”.
The second part of his Independent Review of the Criminal Courts will be published soon, he added.