Because young people are being deprived of their minimum legal rights by employers who seek to avoid the regulations.
Young people are now expected to work unpaid at the start of their careers as the very few opportunities that exist are "for "interns". These are, in the main, just unpaid work.
We have a minimum wage in this country, a guaranteed sum which must be paid to every worker, however this is being abused by employers who think that, by calling their jobs "internships", they can avoid paying the legal minimum. The Minimum Wage regulations should be amended to cover "internships" (they are not mentioned at all) and for employers to be required to pay all young people what they should be paying them.