@XingMing
There needs to be an updated definition of refugee. If someone is paying £000 to be transported on an inflatable boat to the UK because there's no ID Card and it's easy to vanish into a black economy and work for cash. That is economic migration. If you are a woman with small children from Ukraine seeking a place of safety, you are a refugee.
The doctor who saw what has happening to people as they had to treat the results - spoke up and so was tortured. Fled to the U.K. simply because they had one contact there who helped
The journalist who criticised a regime was imprisoned, tortured, allowed out on the promise of writing propaganda but ran - got on a plane by bribing officials at the airport (with a lot of ££ as there was an alert out)
The (academic writer) who published work criticising leaders of a local region. Fled, paid traffickers who promised a trip to the U.K. ended up elsewhere in Europe, as a slave, as the traffickers took their passport. Fled across Europe to escape the traffickers - had to get to a safe place from them.
The family who ended up in the back of a lorry fleeing with no papers, initially at the hands of traffickers, then at the hands of another set trying to escape the first ones. Had sold everything they owned to raise money.
The woman who spoke up against her government and was warned the police were looking for her. Had to flee, not knowing how she'd get out of the country or where she'd end up. Left her children behind rather than risk them in the hands of traffickers. Loved ones scraped together money to help.
Having money doesn't make a person an economic migrant. Having money can make someone a skilled professional or business person who has crossed an oppressive regime and needs to get out fast via whatever means they can. Traffickers aren't always paid in money. They rape, enslave, etc too, as "payment".
All the stories above are slightly adjusted real ones (I've used "they" in most cases as part of that adjustment).
When you have worse than no knowledge about a subject and what your fellow human beings have to go through, please try to listen read and learn (a lot!).