Generally, if someone is coming to the UK as an economic migrant they will have applied for entry prior to leaving their home country, will have a job already lined up and letters from their employers and sponsors to show as proof.
Most of the people crossing the channel are not economic migrants but refugees and asylum seekers, fleeing either unsafe conditions (war, famine etc) or persecution (political, religious or because of their sexuality). The definition of a refugee according to The 1951 United Nations Convention Relating to the Status of Refugees is:“A person who owing to a well-founded fear of being persecuted for reasons of race, religion, nationality, membership of a particular social group or political opinion, is outside the country of his nationality and is unable or, owing to such fear, is unwilling to avail himself of the protection of that country; or who, not having a nationality and being outside the country of his former habitual residence as a result of such events, is unable or, owing to such fear, is unwilling to return to it.”In the UK, a person becomes a refugee when government agrees that an individual who has applied for asylum meets the definition in the Refugee Convention they will ‘recognise’ that person as a refugee and issue them with refugee status documentation. Usually refugees in the UK are given five years’ leave to remain as a refugee. They must then must apply for further leave, although their status as a refugee is not limited to five years.
Refugees certainly aren't coming here for a "soft touch". They're not allowed to work and most are given £40.65 per week to cover all their day to day expenses (food, toiletries, transport etc). If they're given accommodation it will usually be in a hostel or some other poor standard housing (including ex-military camps that have been classified as unfit for human habitation).
There is no such thing as an ‘illegal’ or ‘bogus’ asylum seeker. Under international law, anyone has the right to apply for asylum in any country that has signed the 1951 Convention and to remain there until the authorities have assessed their claim
It is recognised in the 1951 Convention that people fleeing persecution may have to use irregular means in order to escape and claim asylum in another country – there is no legal way to travel to the UK for the specific purpose of seeking asylum
The 1951 Refugee Convention guarantees everybody the right to apply for asylum. It has saved millions of lives. No country has ever withdrawn from it.
The UK's social and medical services are being overloaded, not by brown people fleeing war or persecution (usually from countries where the UK has been involved militarily - Iraq, Afghanistan - or from places where we've sold arms to countries such as Saudi Arabia who then use those weapons to bombard civilian populations in countries like Yemen) but by systematic and chronic underfunding of those services by successive governments.
The UK only accepts 0.026% of all the world's refugees with 86% being offered sanctuary in countries close to their country of origin.
If refugees were allowed to work while their claim for asylum was assessed they could make a massive contribution to the economy and society of the UK:
About 1,200 medically qualified refugees are recorded on the British Medical Association’s database. It is estimated that it costs around £25,000 to support a refugee doctor to practise in the UK. Training a new doctor is estimated to cost between £200,000 and £250,000 and takes between 5 and 7 years to qualify as a junior doctor.