You seem obsessed with this idea. Several threads on the NHL board and now with the NBA.
Like I said in the NHL one, the inherent problem is how much motivation does the current roster have? Maybe slightly different with the smaller roster sizes of the NBA but there'll still be plenty of roster turnover through trades/signings.
Let's just take the primary starters for the 2017-18 Phoenix Suns who won the lottery for the #1 pick.
SG Devin Booker - still on the team
PG Tyler Ulis - waived June 2018
SF T.J. Warren - traded July 2019
PF Marquese Chriss - traded August 2018
C Tyson Chandler - waived November 2018
4/5 guys had no particular loyalty to the Suns. Why would they care about playing for a higher pick? Especially with how small NBA rosters are, I'm not sure a guy would be that enthused to be playing for somebody who could be taking their job.
Mix in a situation where a superstar player misses most of the year due to injury, but happens to be healthy enough down the stretch to help "win" the higher pick.