I can see an initial settler being relatively rich and owning a Toga, but I can’t see him actually wearing it unless his full time job is something that doesn’t actually require doing anything vigorous. You don’t do manual labor in a Toga.
Really, you don’t even do stuff like run in one without making yourself look like a fool.
It’s like if you had to go around in a Tuxedo, except the Tuxedo took twice as long to get on properly, and you had to hold your pants up at the same time.
You can work in one, but only if that work is managerial stuff or orating. I suppose you could also write or do magic in one.
If we are going to get Aristocratic Romans who do work, they aren’t going to be dressed much different than anyone else.
Another interesting thing is that if we are doing vaguely Republican Roman, your little Aristocrats aren’t really going to be doing a huge amount of orgies. Maybe parties where they kill an animal to eat, though.
I think certain Imperial developments like decadence would be an interesting “bad effect” that you could get if you let that get too out of hand. You’d have less hard capital, and your aristocratic class would be both less troublesome, but also less useful to you. The Decadence would also involve the Emperor probably spending more than you really felt comfortable with to stay respectable.
This could develop into it’s own problem of course, because maybe instead of being sated with their lifestyles and money, your Aristocrats get GREEDY at some point (again, maybe another event) and scheme against you or just for money.
Taking the Senate down a peg would make you more directly powerful, but run it’s own risk. Certainly, the Aristocratic families not really DOING anything or producing Quality public servants would be an issue. The only ones they would produce would be Menaces to your dynasty, because they would be the only ones ambitious enough to get good at anything and play politics.