I get that the club is a symbol of pride for the locals, but the club was founded by foreigners. I don't see it as a big deal to let foreigners be socis. They could make it a model so that foreigner soci vote counts less to still let the local voice be heard more. At this point the club needs money and going into the future money is going to matter a lot more.
They do currently let foreigners become socis, it is just harder if you don’t live in Barcelona or elsewhere in Spain. The idea is anybody, Catalan, Spanish or foreign, has to show your commitment before you become a member, if you are not related to an existing member through blood and marriage. This is contrast to the approach of many other clubs where you could just easily become a member by filling out an online application and paying them a fee, for example some of the EPL clubs and Bayern.
I actually like the current approach the club has and understand why the locals are somewhat guarded, it is their club after all and you don't want any undue influence particularly from outside parties. Even though the club was founded by some foreigners (and locals too) and it is getting more international over the years, the club is first and foremost still about the city of Barcelona and Catalonia. At the same time, as an outsider and a foreigner myself, I also understand the club should make membership more approachable to fans overseas. The club has to strike a balance, attracting and catering to increasingly international fans but not lose its Barcelona and Catalan core/identity.
I don't believe getting more money is the root cause of Laporta's idea to open up the memberships. Like I said before, we are not getting that much money from membership fees every year, opening up memberships will in money but not significantly enough. I think Laporta is genuinely trying to make the club more open and approachable to all fans around the world, that's where this is coming from, I think. If this does get approved by the socis, it will be interesting to see how they implement it. Very complex indeed.