UBI reduces the marginal utility of work
Universal Basic Income is controversially discussed and has most recently gained new attention with the promise of presidential candidate Andre Yang to provide UBI to all American citizens if he was elected. 
Giving UBI to all citizens will starkly reduce the marginal utility of work and will thus discourage people to take jobs, especially in the low-wage sector. “Marginal utility quantifies the added satisfaction that a consumer garners from consuming additional units of goods or services”.  With regards to money that means that the first dollar someone will work for will compare to a lesser-valued purpose than the dollars in the UBI. This is because the model of marginal utility has a high initial utility which decreases with every additional unit (in our case, it’s money). With such a decreased marginal utility of work, it becomes less attractive for people who have been formerly jobless to seek employment. The additional effort and time they would have to put into finding and having a new job will only return a lower utility in form of income. UBI could thus have the inverse effect of what it aims to: recipients could stop searching for jobs and rely solely on UBI. This would have several devastating effects on the job market and overall social cohesion. 
Even if marginal utility of work is decreased, people will still pursue their jobs or seek new ones. UBI is not high enough to discourage further employment and still offers marginal utility incentives. Studies and pilot project on UBI have shown that it doesn’t make people lazy or discourage work. 
Economic principles and theories manifest in real life.
[P1] Human behaviour is predictable with economic models. [P2] Marginal utility is the major incentive for work.
Rejecting the premises
[P1] Human behaviour unfolds differently than predicted with economic models. [P2] Marginal utility is not the major incentive for work.