Yes but while the service is targeted for home use there still is remote work which generally requires a VPN back to the company network. They wouldn’t be able to block this. Now sure they might be more inclined to block Mullvad but they’d impact too many businesses by blocking wireguard as a whole.
And assuming they did block Mullvad but not wireguard… Just rent a VPS and install a wireguard server and client there to bridge back to Mullvad.
I know this doesn’t help much but I use T-Mobile cell towers with an always on VPN with no issue. But I don’t see why they’d block Mullvad. (I’d be more concerned that they’d block them than wireguard in general). But there’s completely legitimate reasons to use both so I don’t see them really bothering to block either.
To also add to the other comments: because the government doesn’t want or even need to have a balanced “checkbook”.
Assume for example you want to buy something from me. But you only have “don bucks”. So you buy a widget from me and I charge you 10 “don bucks”.
Problem though, through taxes you’ve only got 5 bucks left. So you just create 5 bucks and add it to your pile. (Deficit spending) Now if you don’t balance that with a loan, your “don bucks” are now worth less because why would I want one of your “don bucks” when tomorrow you could just create a million of them for no reason. (Hyperinflation) So you instead borrow 5 bucks from a friend of yours with a promise to give him back 6 tomorrow. (Bonds)
I still sell you my widget for 10 “don bucks” but now what can I spend my newly acquired “don bucks” on? Well, since everyone has their own currency I ultimately have to spend it on you. This means I end up giving you those 10 bucks back in hopes that you’ll either give me more in return (another loan/bond) or give me back my own currency from money I’ve traded to you.
So in the end spending more than you make (at the nation state level) can be a net boon on the economy as you effectively create a vendor lock in, similar to how companies push their gift cards, etc … because that money is only good in one place. You just have to make sure not to spend too much beyond your means because every dollar you create this way adds to inflation a little bit. So if you create too much then inflation gets out of hand and you end up with hyperinflation and now every one of your citizens wants to get rid of your money because they’ll lose too much before they can give it back.
Just wanted to add… After reading your initial post I did some more digging on adding tracking headers, etc… especially by T-Mobile.
While it’s definitely a thing, it only applies to HTTP traffic. Even HTTPS blocks their ability to add those headers. So any traffic that’s using any other protocol (DNS, email, ssh, or just gaming, etc…) would be safe from your ISP from at least trying to add these tracking headers.