yes, only problem would be that there are people who are far harder to brainwash than others.
let's make this theory:
there are 100 people.
5 are Master Phds, 25 are university degree students who finished but without spectacular results , 30 are high schoolers who finished compulsory and went out in the world and 40 are in-bred hillbillies.
now let's consider you can actually brainwash the 40 hillbillies, and the 30 high schooler, and let's think that you can also brainwash 8 of the university degree students to vote your resolution concerning "let's give all the money to uber rich industry"
problem is, even though you have the 75% of majority, you haven't counted on those who have the master phds, and the other university degree students who know their stuff. So, since what is required to make this law pass is majority AND knowledge in the area, like "industrial engineering" unless there is also a 75% of vote from all the "industrial engineer" this law does not pass.
problem solved.
you need hillbillies, but you also need the smart ones.
and smart ones should be harder to brainwash.
The way I see it, you tick a box next to a law on the voting site. You can tick it or untick it at any time. A law stands as long as it has over 50% ticks from the total eligible voter base. Well, maybe make it 55% to go in effect and 45% to cease, so it doesn't rapidly flip-flop at certain points in time.
only problem with this (i thought of it too) is that sometimes, a good thing isn't necessarily a thing the people like.
to say, "we should welcome immigrants, and feed them, because it's the right thing to do to other human beings"= money cost. increased taxation. slight risk of patriotism over-the-edge aka nationalism.
you manage to get the 55% in the beginning, because people say "we have to be good".
then you hear that one of the "human being" killed somebody, or murdered somebody, or raped somebody, it was just one, but there you have the hillbillies suddenly and drastically changing their votes against keeping them.
you lose the needed amount and reach the 45% now you have to forcefully remove the immigrants by mean of force, since it's obvious the "people" overall do not want them.
and this can happen in a single day.
because with modernization, it doesn't require more than a day to move over a million people.
the chaos which would ensue is enough to make people change their minds again, then again, and again.
solution is simply: accept the law, and if faulty, there is the time needed to re-change it/fix it while you gather the opposite votes, which still require time, since 75% of a countries population is quite...a lot.