Wrong. Basic income lifts the floor. It does not concern itself with the ceiling. Calling it communism is utterly wrong and completely missing the point.
No one has ever said "I'm going to stop making money because I have $1."
At $1 the second dollar is useful, at $50,000, I'm good for the year and will not pursue additional dollars. Replace $50,000 with whatever amount you need to feel content.
I continue to work because I genuinely enjoy what I do.
Rich people are a counterpoint because there are people with incomes the size of a small country, and they are still striving for money. Given the diminishing utility of familiar pleasures, I think its likely that constantly reaching for "more" is the norm, rather than the exception.
Basic income recognizes the idea of a labor market, but admits that this market is neither pure nor perfect: the jobs seeker are in an unstable situation that they have to get out of to pay their bills.
Therefore the employer has an edge in the market.
By decoupling the revenu and the employment, the job seekers can make better decision for themselves.