Let me preface by saying that I have worked salaried positions for almost all of my adult life, with only a few exceptions for part-time work. I am working my first hourly full-time job.
When you get paid overtime for working too long, your manager suddenly becomes very insistent that you don't work past your scheduled hours. However, if you are salaried, then there is always an expectation that you work until the job is finished.
At my current job, there are salaried employees and hourly employees. The salaried employees are almost constantly in meetings and sometimes work 70 hours because they are obsessed with completing work. As an hourly employee, I don't really care that they're wasting their own time with countless meetings.
I think salary pay also strongly encourages workaholism. Workaholics are hurting themselves to get ahead, but also really hurt other employees by setting implied work expectations. If these people were forced to stick to regular work hours (because the employer does not want to pay overtime), it would be a better working situation for everyone.
And also, those employees will finally realize how annoying and counterproductive they are when they schedule 16,000 consecutive meetings.