So just to clarify, let's say you're 100%, you're entitled to take the lump sum of 100% as of April 2019? $360,000?
Would that subtract the DA money you've already been paid? i.e. using the example they give their (100% in 2006 = $250,000) would you be paid $110,000 if you elected lump sum? Or is it a simple calculation of, everyone who got 100%, regardless of what thye've been paid already, will get $360,000?
Also, with regards to the lump sum being less money overall, that's true, but don't forget the time value of money. If hypothetically, one took that money and plowed it into an investment that returned 5%/year (which is an entirely reasonable expectation of RoI simply by buying the entire stock market) you'd have about $1.2 million in 25 years.