All your argument was that it's too expensive. Clearly it's not. If the manner in which the money is spent (or the feelings we'll have while sending it) is actually the limiting factor, you'll need to actually make that argument.
It's not too expensive - the US can easily afford $150B. We just have to decide that it's a priority and make it happen. Each year we some how find almost a trillion dollars for defense (more if you include "black budget") and no one blinks an eye.
I think the US is still stuck in the Cold War mentality of making military spending an “untouchable” cut. Meanwhile country infrastructure is falling apart and our equality gap is unprecedented. Sounds a lot like the USSR.
I'll assume that downvotes mean I wasn't clear: the US is currently spending that much ($150B apparently, I haven't checked) on R&D for drugs. It's just doing it through different means, presumably by paying higher insurance premiums and healthcare costs that end up going to drug companies to fund their R&D. If instead we payed that cost through taxes, then there's no theoretical reason why it would have to cost any more. So why would it be too expensive, given that we already pay that much via a different route? Of course, it's not politically expedient and won't happen anytime soon.
It may be nice in theory to have government manage drug R&D, but it is not practical. It's simply too expensive