Fiscally, yes. There are already many signs that Millennials on the "from each according to his ability" side of things already tend to oppose redistribution. This group will grow in number and influence as Millennials get older and wealthier.
Socially, I'm not really sure.
But one has to ask, even if they are somewhat fiscally moderate/conservative, how does that apply to policies? Just because you are fiscally conservative doesn't necessarily mean you are against, say, single-payer healthcare, or expanding social security, and so on. Millennials have shown greater openness to such proposals and generally favor government in many aspects more than other generations. Millennials are also open to taxes on the wealthy, and that is hardly surprising given the age we have grown up in, where inequality and the wealthy gaming the system has become a defining issue of our generation.
However, personally, I still believe that aging and financial status doesn't guarantee a shift towards conservatism at any level. Studies don't support the aging aspect at least. Millennials are not really all that fiscally liberal right now, sure, but just because they aren't does not mean they will trend even more towards fiscal conservatism down the road.
Polls show them favoring single payer. They just don't want high taxes to go along with it. Ideally they'd prefer something like cutting military expenditures in favor of healthcare, so as to not raise taxes, like Canada.
Takes are actually lower there. General rule is, whatever bracket you are in here, you will pay one bracket lower there.
