Canada and we used to be cool.  Before the Harperites took over... the Conservative party has been in power for a decade and turned the clock back by several more than that.

Before Harper came to power 

- Women won the legal right to go topless (still can but now the argument is over burquas and hijabs as Harper fights against a pluralistic multicultural society.)

- Marijuana was on the verge of decriminalization

- We had the highest human devolopement index score in the world for years

- Gay marriage was legal (one of the first few countries to do so), prostitution was on the road to decriminalization (they fought that for a decade in court but caved on the gay marriage)

on the whole a progressive left of center country working towards international co-operation and we gave a shit about science and the environment.

In the last decade, we have had wars plural, harsh drug laws passed, manditory minimum sentences, a massive expansion of the secret police (CSE and CSIS et. al) all with mimimal oversight.  Protest will be made illegal unless the bill before the house is amended.  The government was convicted of voter fraud on numerous occasions (in and out scheme, the ethics parliamentary secretary falsified his election expenses, and at least one member was involved in a widespread robocall voter suppression scheme to name but a few).  At the same time our standard of living in dollars adjusted for cost of living increases and human development index have been dropping (from 1st to 8th in the later).  Scientists are muzzled to the point where the Journal Nature writes editorials about it (http://www.cbc.ca/news/canada/nature-journal-criticizes-canadian-muzzling-1.1274336), our environmental record has been among the worst in the world for most of the last decade.

So we used to be cool, but have taken a long slow gradual slide into banal and stupid.

The street 'Wall Street' is likely named as such simply because there was once a wall there;

There is however, an English map that calls the current Wall Street 'Waalstraat', which you are maybe refering to. This could have indeed meant it was named after Walloon Belgians (a 'Waal'), but is was probably just a typo though with an extra 'a', because the word 'wal' is used in Dutch and means palisade/stockade or earthen wall in English, all types of 'walls'. A more sensible name for a street formed by an actual wall, that also had had various remodels over time. This would be similar to how the English butchered the word 'Deutsch' into 'Dutch' during the same era, which is why most Americans now think we speak German. Even if it wasn't just a typo, the 'Waal' is a river in the Netherlands, so it finally could also have been named after that, though this is just as unlikely.

So in short, there is a slight possibility the street was named after Belgians, however unlikely, but the other part is definitely not true.

New York, called Nieuw-Amsterdam (New Amsterdam) at the time of it's founding, was definitely not 'founded' by Belgians, Walloon or otherwise. It was founded by a Dutch merchantship leaving from Amsterdam after Englishman Henry Hudson in service of the Dutch Republic first explored the region searching for a passage to Asia, but found an abundancy of beavers instead. The Dutch built a fortress on what is now Lower Manhattan (it's successor is visible on the map above), along with a fur trading post. In the town that developed soon after, there were some Walloon settlers, yes, but they were among Dutch and others. Today the flag of New York City is even the old 17th century Dutch 'Prince's Flag' turned sideways.

Even our province of Luxembourg is bigger than your country. :p