Temp offices should not be allowed to exist.
I disagree.
Working for a temp agency doing catering, sports venue and whatnot is generally more stable income than working for several places like that directly. Temp agencies work well for industries where demand is variable but predictable.
Companies that use temps to fill their baseline staffing requirements to skirt legal/ethical requirements are terrible though.
The temp offices usually work with day contracts, allowing them to 'fire' you when you get a bad review, they don't need you that day or they don't like you. This provides a very unstable income.
In my case, the company that was hiring me used the temp jobs as a kind of 'trial period' and easily disposable workforce. If somebody did not live up to expectations, that person does not come back, but every day, 50 of those workers were needed. It took me 1.5 year as a temp worker on day contracts to get a permanent contract from the employer. I was a lucky exception.
Looking back on the stress, the uncertainty, the misery and humiliation I had to undergo to keep the most basic job, I would never, ever go back to that industry again.