The goal of PoW is to be resilient and neutral in order to build a secure consensus from parties that don't know or trust each others and it's the most efficient way to achieve that goal. We currently don't know other consensus mechanism that would be as resilient or neutral. There is Proof-of-Less-Work which is an interesting innovation from Alephium but it's still based on PoW.
How the bourgeois controls money in Bitcoin ? How can infinite growth happen on a fixed supply ? How consumption would increase if money tends to gain value over time ?
Money ≠ Capitalism
Money is a primitive technology discovered by human way before scribing. In fact the first form of scribing appearing is money. It's so old and so embeded in our civilization that we don't really know how it works or how it emerge. We have no proof that bartering existed before money, the idea that money was made to fix bartering issues is false.
Bitcoin ≠ currency
Bitcoin is not a currency, it's a decentralized p2p network of trust building a consensus over a common immutable history that qualify as truth. Money is the first application of it but we already have other usecase such as the free software OpenTimeStamp used during Guatemala's election for exemple.
Edit : Grammar