Oh no. I mean waiters too. You want that nice restaurant? It's gotta have staff. Gas stations and corner stores? Need staff. Every shop you go in needs staff and they aren't going to be paid decent wages generally. Why are temp workers being excluded from being allowed in a city? Plenty of places need people on a temporary basis and plenty of people need such work.

Your second point ignores the problem I'm pointing out. Rent must be limited in some way so that all the people the city runs on can live and work there. Given the gratuitous mass of people in a city, the incentive for investment and development will always be there. I'll need a citation for the idea that an affordable city doesn't get money from such things. That argument reeks of "greed justifying why it's OK to have impractical and inhumane conditions". There are more metrics than money.