Would be unconstitutional in the United States.

sounds like something Trump would do.

If you restrict voting rights only to people who legally work, Democrats would never win

To everyone who thinks this is a bad idea and unconstitutional, you should read why the US constitution has the Elecoral College layer of voting.

"The reason that the Constitution calls for this extra layer, rather than just providing for the direct election of the president, is that most of the nation’s founders were actually rather afraid of democracy. James Madison worried about what he called “factions,” which he defined as groups of citizens who have a common interest in some proposal that would either violate the rights of other citizens or would harm the nation as a whole. Madison’s fear – which Alexis de Tocqueville later dubbed “the tyranny of the majority” – was that a faction could grow to encompass more than 50 percent of the population, at which point it could “sacrifice to its ruling passion or interest both the public good and the rights of other citizens.”

Yes, they were afraid of losing power if they had direct democracy. However, the point of it being for the public good and to not violate the rights of other citizens is bullshit considering that black slaves weren't allowed to vote, women weren't allowed to vote, natives weren't allowed to vote, etc. Only white male property owners could vote.

I think those particular requirements are a terrible idea, but there is debate to be had about the pros and cons of letting general population vote. On the one hand, it means everybody gets a say and is able to have a sliver of a chunk of a fraction of an impact on politics. On the other hand, everybody includes a lot of people you probably wouldn't want to have that impact.
It's a pickle. In fact the founding fathers of the US didn't want to give the public the vote.
But you have to be careful with this idea that only certain people should be allowed to vote, because will usually shape politics automatically in those people's favour. eg. I'm sure women's rights received a lot more attention once women were given the vote, because before that, such things were not vote winners.

Scisca said: If you restrict voting rights only to people who legally work, Democrats would never win

Specify that... "legaly" is a very broad term.

The voting system is fine the way it is. Trump and Brexit happened for a very good reason and lead to more intelligent results than people might think.

No it isn't. There have been international tests and comparisons.

It's very important that the poor and less educated also be represented. The question you have to also ask is are they fit to represent themselves? Many people vote against their own interests because they are misled by political media and propaganda.

In many situations in life you would defer to more educated experts and professionals to guide you on matters that affect your life, the most obvious being doctors. Another example is attorneys. Ever hear the phrase “He who represents himself has a fool for a client”? Quote by Abraham Lincoln.