None of that would make up for all the lost equipment (to theft, to disuse, to misuse, to lack of maintenance). Nor would any of that encourage new investment (how can you trust that the government won't go back to its old bad ways?). Nor would it bring back all the population that has left for Colombia, Ecuador, and Brazil.
But all of what you said and all of what I listed, together, would be a good start. It would also help a great deal to abandon all the violent rhetoric, allow truly free and fair elections, allow the opposition to win when they do, and so on and so forth.
Argentina did all of what you said (well, they still have some subsidies), and it wasn't quite enough by itself. The primary budget deficit is still very large and the immediate driver of inflation there.
Large welfare state + underdeveloped economy + expropriation == no trust/confidence. Or, how to destroy your country in just a few steps and a just few years.
Macri's government hopes that they can slowly adjust things rather than go the shock therapy route -- if all goes well, it could work, but both approaches are risky, and it could all end badly again either way.
> Mr. Maduro hasn’t specified when gasoline prices may start rising. Some of his detractors have started to call his plan a “neoliberal” austerity package that undermines the socialist ideology long espoused by his ruling party.
I'm not sure the people would stand for what's needed to fix the problem -- they know they don't want the country in the destroyed state it's in, but I'm not sure they're all on the same page on what's needed to fix it aside from "less corruption please".
For the suggestions in the top-level comments that might just apply to subsidies, though. I'm sure allowing imports, exports (and international aid...) would be broadly popular.
1: https://www.wsj.com/articles/venezuela-devalues-currency-and...