It's obviously a tradeoff, but there will be enough people to do the necessary work anyway, even with UBI, and no one else should feel pressured to do work to survive.

With how advanced the current technology is, people are actually no longer need to work in order to survive or have basic necessities. But artificial pressure were created so people have to help amassing the wealth for billionaires/corporates.
Sure, there might be some people who're want to do nothing and live in as a lowest class without anything other than basic necessity but there would be very small amount of them as human usually strive for the better QoL. And we also shouldn't just let people die if they don't want to work. If they want to be at the bottom of the society, just let them be. "You have to work in order to survive"-Age actually should have ended long ago if not for the severe inequality issue we're having. Yes, it won't solve EVERY problem but it wil solve MANY problems and there aren't many downside to it other than billionaires having lower number in their bank accounts.

And drugs, alcholism, and theft issues weren't caused by being jobless, it caused by many issues like lacking proper education, bad upbringing, security issues, and being penniless. Also alcoholism problem among the poor is actually a cognitive bias. According to the statistics, middle class has more alcoholism issues than the lower class