There are a few sections restricted to solo only, but it’s not the default, the matchmaking is pretty quick for a random group and there’s a variety of people always looking to form groups for different tasks. One word of warning, people move fast, until you get parkour down, you might just end up running from the start to end of a level if you join groups, they’ll have completed the objectives and be waiting for you to extract.
Clans exist, and each have their own space station called a dojo that’s customized by them (cost is based on size of the clan, as a solo I was able to build up and level a clan on my own).
This is also a proposed wealth tax not just an income tax, the US would probably do something like tax US citizen ultimate beneficial ownership of assets held which can be traded on US exchanges, so unless someone entirely divests there isn’t a legal tax avoidance strategy apart from the exit tax.
Honestly 2% on billionaires is too low imo. I’m in favor of starting lower and having a progressively increasing marginal wealth tax, like 1% on all assets over $10M, additional 1% on all assets over $100M, etc.