Economy Balance feels way off

I know the devs said they are looking into the economy during Early Access, so I guess player opinions are important.

My opinion is based on almost 80 hours in the game.

In short: Infantry is way too expensive compared to everything else.

A basic kit can cost you 4k.

A more specialized kit can already cost you up to 10k or more.

So why should I be able to buy a Blackhawk, just drop supplies at our FOBs, and profit 10x the amount infantry can?

Why should I be able to build a FOB all round and profit 10x the amount infantry can?

Why should I be able to sit on a mortar or AA gun all round long and profit 10x the amount infantry can?

Speaking of mortars and AA guns, it is not healthy at all that these things can basically be built for free. You can build 10 of them, and all you really need is the logistics to keep them running. There is basically zero risk to losing them because you can just build new ones.

As infantry, you are expected to constantly be in a combat zone, but ironically you pay the most while earning the least.