Agreed, unions level the playing field between large businesses and individual workers. If you’re a single employee in a small business (say, less than 10 employees) you have a reasonable chance to negotiate with your employer. As a single employee in a business with hundreds, it’s basically impossible - you have almost no leverage and the employer has too many incentives to not acknowledge your needs.

Unfortunately, union organizations are themselves “big business” and ripe for corruption.

Transparency is the real answer. We should all know and share what our working conditions, benefits, salaries, etc. are. Companies should be up front about what they are offering and how their employees are treated. If you’re applying for work at a place that does 10% layoffs every 3 years, you should be able to easily see that from a reliable source, not just random scattered news stories and ex-employee anecdotes. If your prospective employer has been giving upper management 15% annual raises in total compensation for the past 20 years, while rank and file have been getting 1.5-2%, that should be readily available information.